Intent to Ship: forced-color-adjust: preserve-parent-color

Sara Tang

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Oct 28, 2021, 5:45:04 PM10/28/21

to blin...@chromium.org, Alison Maher, Daniel Libby

Summary

Adds the ‘preserve-parent-color' value to the ‘forced-color-adjust' CSS property. When Forced Colors Mode is enabled, the ‘color’ property is inherited, and we’ve set ‘forced-color-adjust: preserve-parent-color', the ‘color’ property will compute to the used value of its parent. Otherwise, ‘forced-color-adjust: preserve-parent-color' value behaves the same as ‘forced-color-adjust: none’.

Contact emails

sar...@microsoft.com, alison...@microsoft.com

Explainer

https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Accessibility/PreserveParentColor/explainer.md

Specification

https://www.w3.org/TR/css-color-adjust-1/#forced-color-adjust-prop

Summary

Adds the ‘preserve-parent-color' value to the ‘forced-color-adjust' CSS property. When Forced Colors Mode is enabled, the ‘color’ property is inherited, and we’ve set ‘forced-color-adjust: preserve-parent-color', the ‘color’ property will compute to the used value of its parent. Otherwise, ‘forced-color-adjust: preserve-parent-color' value behaves the same as ‘forced-color-adjust: none’.

Motivation

‘forced-color-adjust' is a CSS property that allows developers to opt out of Forced Colors Mode.

Previously, there were two supported values: ‘auto’ and ‘none’, which can be used to control whether or not an element’s styles are adjusted by the UA in Forced Colors Mode. A third value, ‘preserve-parent-color', has recently been introduced in the spec, which provides similar behavior to ‘none’, except that it also allows an element to inherit its parent's used ‘color’ value. In other words, ‘preserve-parent-color' provides the ability for an element to inherit its parent’s Forced Colors Mode adjusted ‘color’ value.

The intention of ‘preserve-parent-color’ is to get a reasonable behavior for SVG icons that utilize ‘currentColor’ when styling ‘fill’ and ‘stroke’ in Forced Colors Mode, as described in [css-color-adjust-1] Spec currently breaks use of currentColor for SVG icons in WHCM · Issue #6310 · w3c/csswg-drafts · GitHub.

The use of ‘currentColor’ when styling an SVG icon is a common pattern used by authors to ensure an accessible experience in Forced Colors Mode. For example, in this sample logo, an author would expect the logo to automatically adjust to use the ‘CanvasText’ system color for ‘fill’ and ‘stroke’ in Forced Colors Mode, as a result of setting each to ‘currentColor’.

This behavior, however, became broken when we moved from forcing colors at computed value time to used value time: [css-color-adjust-1] Is forced color computed or used value? · Issue #4915 · w3c/csswg-drafts · GitHub. Instead of inheriting ‘CanvasText’, as before, the above sample logo would inherit the computed ‘color’ value of its parent, resulting in a logo that is no longer readable in Forced Colors Mode.

The new ‘preserve-parent-color' value was added to address this common SVG use case. By changing the default value of ‘forced-color-adjust’ for SVGs from ‘none’ to ‘preserve-parent-color', SVG icons that make use of ‘currentColor’ will now inherit the used ‘color’ value of its parent, as expected.

It is important to note that this may break SVGs that expect the opposite inheritance behavior for the ‘color’ property. However, the behavior of `preserve-parent-color` handles the most common SVG use cases, and the behavior better matches legacy implementations of High Contrast Mode.

Blink component

Blink>CSS

Search tags

css, forced, colors, forced-colors, forced-color-adjust, preserve-parent-color

TAG review

https://github.com/w3ctag/design-reviews/issues/681

TAG review status

Issues open

Risks

Interoperability and Compatibility

Interoperability Risks Gecko has shipped a version of Forced Colors Mode without support for ‘forced-color-adjust’. Although there is an open bug for adding support (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210), development has not been started yet. Compatibility Risks We are updating the default value of ‘forced-color-adjust’ for SVGs in Forced Colors Mode from ‘none’ to ‘preserve-parent-color'. This means that SVGs will now inherit the used ‘color’ of their parent at computed value time. The new behavior will better match author expectation and historical SVG behavior in IE and legacy Edge.

Gecko: In development (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210)

WebKit: No signal (https://lists.webkit.org/pipermail/webkit-dev/2020-December/031642.html)

Web developers: Positive (https://github.com/w3c/csswg-drafts/issues/6310)

Debuggability

This will be included in the larger effort to emulate Forced Colors Mode: https://bugs.chromium.org/p/chromium/issues/detail?id=1130859&q=owner:kahinds%40microsoft.com&can=2

Is this feature fully tested by web-platform-tests?

Yes

Flag name

--enable-blink-features=ForcedColorsPreserveParentColor

Requires code in //chrome?

False

Tracking bug

https://bugs.chromium.org/p/chromium/issues/detail?id=1242706

Estimated milestones

No milestones specified

Link to entry on the Chrome Platform Status

https://www.chromestatus.com/feature/4887620095049728

This intent message was generated by Chrome Platform Status.

Blink component

Blink>CSS

Search tags

css, forced, colors, forced-colors, forced-color-adjust, preserve-parent-color

TAG review

https://github.com/w3ctag/design-reviews/issues/681

TAG review status

Issues open

Risks

Interoperability and Compatibility

Interoperability Risks Gecko has shipped a version of Forced Colors Mode without support for ‘forced-color-adjust’. Although there is an open bug for adding support (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210), development has not been started yet. Compatibility Risks We are updating the default value of ‘forced-color-adjust’ for SVGs in Forced Colors Mode from ‘none’ to ‘preserve-parent-color'. This means that SVGs will now inherit the used ‘color’ of their parent at computed value time. The new behavior will better match author expectation and historical SVG behavior in IE and legacy Edge.

Gecko: In development (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210)

WebKit: No signal (https://lists.webkit.org/pipermail/webkit-dev/2020-December/031642.html)

Web developers: Positive (https://github.com/w3c/csswg-drafts/issues/6310)

Debuggability

This will be included in the larger effort to emulate Forced Colors Mode: https://bugs.chromium.org/p/chromium/issues/detail?id=1130859&q=owner:kahinds%40microsoft.com&can=2

Is this feature fully tested by web-platform-tests?

Yes

Flag name

--enable-blink-features=ForcedColorsPreserveParentColor

Requires code in //chrome?

False

Tracking bug

https://bugs.chromium.org/p/chromium/issues/detail?id=1242706

Estimated milestones

No milestones specified

Link to entry on the Chrome Platform Status

https://www.chromestatus.com/feature/4887620095049728

This intent message was generated by Chrome Platform Status.

Fernando Serboncini

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Oct 29, 2021, 11:22:11 AM10/29/21

to Sara Tang, blin...@chromium.org, Alison Maher, Daniel Libby

Could you clarify if this I2S:

1. just adds the 'preserve-parent-color' value to forced-color-adjust and doesn't apply it anywhere by default.

2. adds it and changes the default value of forced-color-adjust to be "preserve-parent-color" on all SVG elements
3. adds it and changes the default value of forced-color-adjust to be "preserve-parent-color" only on the SVG root element (that then gets propagated down)

it seems that #3 was decided on the CSSWG, but your summary and crbug's CL looks more like #1, while your motivation seems like #2.

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Sara Tang

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Oct 29, 2021, 4:11:44 PM10/29/21

to Fernando Serboncini, blin...@chromium.org, Alison Maher, Daniel Libby

Hi Fernando,

This I2S does #3.

Thanks!

Sara

From: Fernando Serboncini <fs...@chromium.org>
Sent: Friday, October 29, 2021 8:21 AM
To: Sara Tang <Sara...@microsoft.com>
Cc: blin...@chromium.org <blin...@chromium.org>; Alison Maher <Alison...@microsoft.com>; Daniel Libby <dli...@microsoft.com>
Subject: [EXTERNAL] Re: [blink-dev] Intent to Ship: forced-color-adjust: preserve-parent-color

Fernando Serboncini

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Oct 29, 2021, 4:13:05 PM10/29/21

to Sara Tang, blin...@chromium.org, Alison Maher, Daniel Libby

Great. It makes sense.

thank you :)

Chris Harrelson

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Nov 4, 2021, 3:33:17 PM11/4/21

to Fernando Serboncini, Sara Tang, blin...@chromium.org, Alison Maher, Daniel Libby

I don't see much evidence of active development on that issue. How about re-using https://github.com/mozilla/standards-positions/issues/463 and asking for Mozilla to provide a position?

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADp2-T8%2By66HWwJP8p2-%2BcvNTQeN1%3DCbP6x9z0Su3ZJBOcNQ3w%40mail.gmail.com.

Manuel Rego Casasnovas

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Nov 5, 2021, 5:39:49 AM11/5/21

to Chris Harrelson, Fernando Serboncini, Sara Tang, blin...@chromium.org, Alison Maher, Daniel Libby

On a similar note of what I mentioned in the new "only" keyword for
color-scheme property, I'm having a hard time getting the whole picture
of that spec: https://drafts.csswg.org/css-color-adjust/

Do we have a full explainer of the whole spec? The spec is about 2
different things color schemes and forced colors, but they have some
similarities. Then the properties names and values are quite different.
E.g. "color-scheme: light only" vs "forced-color-adjust: none" vs
"color-adjust: exact". They are somehow about opting out of something,
but the properties names and syntax is pretty different.

Cheers,
Rego

On 04/11/2021 20:33, Chris Harrelson wrote:
>
>
> On Fri, Oct 29, 2021 at 1:13 PM Fernando Serboncini <fs...@chromium.org
> <mailto:fs...@chromium.org>> wrote:
>
>
> Great. It makes sense.
>
> thank you :)
>
> On Fri, Oct 29, 2021 at 4:11 PM Sara Tang <Sara...@microsoft.com
> <mailto:Sara...@microsoft.com>> wrote:
>
> Hi Fernando,
>
> This I2S does #3.
>
> Thanks!
> Sara

> ------------------------------------------------------------------------
> *From:* Fernando Serboncini <fs...@chromium.org
> <mailto:fs...@chromium.org>>
> *Sent:* Friday, October 29, 2021 8:21 AM
> *To:* Sara Tang <Sara...@microsoft.com
> <mailto:Sara...@microsoft.com>>
> *Cc:* blin...@chromium.org <mailto:blin...@chromium.org>
> <blin...@chromium.org <mailto:blin...@chromium.org>>; Alison
> Maher <Alison...@microsoft.com
> <mailto:Alison...@microsoft.com>>; Daniel Libby
> <dli...@microsoft.com <mailto:dli...@microsoft.com>>
> *Subject:* [EXTERNAL] Re: [blink-dev] Intent to Ship:

> forced-color-adjust: preserve-parent-color
>
> Could you clarify if thisI2S:
> 1. just adds the 'preserve-parent-color' value to
> forced-color-adjust and doesn't apply it anywhere by default.
> 2. adds it and changes the default value of forced-color-adjust
> to be "preserve-parent-color" on all SVG elements
> 3. adds it and changes the default value of forced-color-adjust
> to be "preserve-parent-color" only on the SVG root element(that
> then gets propagated down)
>
> it seems that #3 was decided

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310%23issuecomment-862517612&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339738955%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=DU66ohWIfaMOCWEffOH%2FZnWTEmITV7ZaSmeWT%2BmZIcY%3D&reserved=0>on
> the CSSWG
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310%23issuecomment-862517612&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339748916%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=KS9HCv0cUqSOVfnn%2FPoGxNwQNv5S1hztDwF%2FVSvUmyI%3D&reserved=0>,

> but your summary and crbug's CL looks more like #1, while your
> motivation seems like #2.
>
>
> On Thu, Oct 28, 2021 at 5:45 PM 'Sara Tang' via blink-dev

> <blin...@chromium.org <mailto:blin...@chromium.org>> wrote:
>
>
> Contact emails
>
> sar...@microsoft.com
> <mailto:sar...@microsoft.com>, alison...@microsoft.com
> <mailto:alison...@microsoft.com>
>
>
> Explainer
>
> https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Accessibility/PreserveParentColor/explainer.md
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2FAccessibility%2FPreserveParentColor%2Fexplainer.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339748916%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=DWthG7wyL%2BhzWXHdx4oQs2PNg49AhRoV0vXyNz5gXAk%3D&reserved=0>
>
>
> Specification
>
> https://www.w3.org/TR/css-color-adjust-1/#forced-color-adjust-prop
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-color-adjust-1%2F%23forced-color-adjust-prop&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339758868%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=20lJLa8c%2BxRDoldBHmd8Zro%2F%2FYtqwK%2BI%2BYwne0ES6Y8%3D&reserved=0>

>
>
> Summary
>
> Adds the ‘preserve-parent-color' value to the
> ‘forced-color-adjust' CSS property. When Forced Colors Mode
> is enabled, the ‘color’ property is inherited, and we’ve set
> ‘forced-color-adjust: preserve-parent-color', the ‘color’
> property will compute to the used value of its parent.
> Otherwise, ‘forced-color-adjust: preserve-parent-color'
> value behaves the same as ‘forced-color-adjust: none’.
>
>
> Contact emails
>
> sar...@microsoft.com

> <mailto:sar...@microsoft.com>, alison...@microsoft.com
> <mailto:alison...@microsoft.com>
>
>
> Explainer
>
> https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Accessibility/PreserveParentColor/explainer.md
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2FAccessibility%2FPreserveParentColor%2Fexplainer.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339768823%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=aRu0keSh5Rgj%2BVTIFQ9%2BLXLuWr0bdGWAgxk3niZPKkw%3D&reserved=0>
>
>
> Specification
>
> https://www.w3.org/TR/css-color-adjust-1/#forced-color-adjust-prop
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-color-adjust-1%2F%23forced-color-adjust-prop&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339778777%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=2BCGuB1g2yK%2BwFjvlbRmHrZK4VjbnpOn6wlAOWsbFW8%3D&reserved=0>

>
>
> Summary
>
> Adds the ‘preserve-parent-color' value to the
> ‘forced-color-adjust' CSS property. When Forced Colors Mode
> is enabled, the ‘color’ property is inherited, and we’ve set
> ‘forced-color-adjust: preserve-parent-color', the ‘color’
> property will compute to the used value of its parent.
> Otherwise, ‘forced-color-adjust: preserve-parent-color'
> value behaves the same as ‘forced-color-adjust: none’.
>
>

> *Motivation*
> *

>
> ‘forced-color-adjust' is a CSS property that allows
> developers to opt out of Forced Colors Mode.
>
> Previously, there were
> two supported values: ‘auto’ and ‘none’, which can be used
> to control whether or not an element’s styles are adjusted
> by the UA in Forced Colors Mode. A third
> value, ‘preserve-parent-color', has recently been
> introduced in the spec, which provides similar behavior to
> ‘none’, except that it also allows an element to
> inherit its parent's used ‘color’ value. In other
> words, ‘preserve-parent-color' provides the ability for an
> element to inherit its parent’s Forced Colors Mode
> adjusted ‘color’ value.
>
> The intention of ‘preserve-parent-color’ is to get a
> reasonable behavior for SVG icons that utilize
> ‘currentColor’ when styling ‘fill’ and ‘stroke’ in Forced
> Colors Mode, as described in [css-color-adjust-1] Spec
> currently breaks use of currentColor for SVG icons in WHCM ·
> Issue #6310 · w3c/csswg-drafts · GitHub

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339788762%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Dob%2FFFwGosRxYuAKYPnyy%2BUq%2FpIOxheAWH28J7aDTkk%3D&reserved=0>.

>
> The use of ‘currentColor’ when styling an SVG icon is a
> common pattern used by authors to ensure an accessible
> experience in Forced Colors Mode. For example, in
> this sample logo,

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcodepen.io%2Fsomelaniesaid%2Fpen%2FYzqxogg&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339788762%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=7sRhz%2BN0OGJS1O3mcuGtPew%2FaFc3DfH1RdJUQxGiztg%3D&reserved=0> an

> author would expect the logo to automatically adjust to use
> the ‘CanvasText’ system color for ‘fill’ and ‘stroke’ in
> Forced Colors Mode, as a result of setting each to
> ‘currentColor’.
>
> This behavior, however, became broken when we moved from
> forcing colors at computed value time to used value
> time: [css-color-adjust-1] Is forced color computed or used
> value? · Issue #4915 · w3c/csswg-drafts · GitHub

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F4915&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339798714%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=PhV3v3KSW4C5ZA2ijDs7idQKnVSdhnKJ8%2BMg8595xP4%3D&reserved=0>. Instead

> of inheriting ‘CanvasText’, as before, the above sample logo

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcodepen.io%2Fsomelaniesaid%2Fpen%2FYzqxogg&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339808668%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=dI0KmfEyg7QYr4SWu4KV5SIzImGVhEMuVZLRpwGybQs%3D&reserved=0> would

> inherit the computed ‘color’ value of its parent, resulting
> in a logo that is no longer readable in Forced Colors Mode.
>
> The new ‘preserve-parent-color' value was added to address
> this common SVG use case. By changing the default value of
> ‘forced-color-adjust’ for SVGs from ‘none’ to
> ‘preserve-parent-color', SVG icons that make use of
> ‘currentColor’ will now inherit the used ‘color’ value of
> its parent, as expected.
>
> It is important to note that this may break SVGs that expect
> the opposite inheritance behavior for the ‘color’ property.
> However, the behavior of `preserve-parent-color` handles the
> most common SVG use cases, and the behavior better matches
> legacy implementations of High Contrast Mode.
>

> *
> *
> *
>
>
> Blink component
>
> Blink>CSS
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Flist%3Fq%3Dcomponent%3ABlink%253ECSS&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339808668%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=mIPcRPvMnwO2HOCEVOq7r353lNjM8CUzBkuYvdTyAWQ%3D&reserved=0>
>
>
> Search tags
>
> css
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeatures%23tags%3Acss&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339818620%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=SHWBFGBFuNTysia69jjiNVJLsa29c8zsI%2B3N3FZhJ4c%3D&reserved=0>, forced
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeatures%23tags%3Aforced&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339828575%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=NoRXKO3PIpLC6A7e8WOoGc9jLyhrl8fo9Ai5CS6XM1M%3D&reserved=0>, colors
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeatures%23tags%3Acolors&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339828575%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=YthbjXfiXO9wof3nuOetIwinBK0jjUP5AVhVUfeukU8%3D&reserved=0>, forced-colors
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeatures%23tags%3Aforced-colors&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339838512%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=bwj8d5Iuysd%2BK%2BGQWxfZfKtqlSAjXnEbZlBpXt8Ea%2BQ%3D&reserved=0>, forced-color-adjust
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeatures%23tags%3Aforced-color-adjust&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339848469%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=pgrHxrq5huDuH3GaPn6SBNQgf6ufElvunWetWrr5hCg%3D&reserved=0>, preserve-parent-color
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeatures%23tags%3Apreserve-parent-color&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339848469%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=R6q1%2Bj%2Bx9%2BU8cVp56H39B9jputo8HOPLnStP%2B7SCa4c%3D&reserved=0>
>
>
> TAG review
>
> https://github.com/w3ctag/design-reviews/issues/681
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3ctag%2Fdesign-reviews%2Fissues%2F681&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339858423%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=G3OVKdoW0%2Bslgd7OCWDP9byONv%2BMi14PgnPIE5CcEZc%3D&reserved=0>

>
>
> TAG review status
>
> Issues open
>
>
> Risks
>
>
>
> Interoperability and Compatibility
>
> Interoperability Risks Gecko has shipped a version of Forced
> Colors Mode without support for ‘forced-color-adjust’.
> Although there is an open bug for adding support
> (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339868380%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=6pzvIhvcNPl9Jcy2oUEHZac%2F%2FosDl9L6WhUBA4GPF7E%3D&reserved=0>),

> development has not been started yet. Compatibility Risks We
> are updating the default value of ‘forced-color-adjust’ for
> SVGs in Forced Colors Mode from ‘none’ to
> ‘preserve-parent-color'. This means that SVGs will now
> inherit the used ‘color’ of their parent at computed value
> time. The new behavior will better match author expectation
> and historical SVG behavior in IE and legacy Edge.
>
>
>

> /Gecko/: In development
> (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339868380%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=6pzvIhvcNPl9Jcy2oUEHZac%2F%2FosDl9L6WhUBA4GPF7E%3D&reserved=0>)

>
>
> I don't see much evidence of active development on that issue. How about
> re-using https://github.com/mozilla/standards-positions/issues/463
> <https://github.com/mozilla/standards-positions/issues/463> and asking
> for Mozilla to provide a position?
>
>
>

> /WebKit/: No signal
> (https://lists.webkit.org/pipermail/webkit-dev/2020-December/031642.html
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.webkit.org%2Fpipermail%2Fwebkit-dev%2F2020-December%2F031642.html&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339878342%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=bU79IZ9OB%2BPjnVGl5mIvhfGc96XSvLIqMlld9nER1ZY%3D&reserved=0>)
>
> /Web developers/: Positive
> (https://github.com/w3c/csswg-drafts/issues/6310
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339888302%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=eBwScAiBdj7pj4ZIyRy1CA1KylStyUnAA2wDX0bGeNI%3D&reserved=0>)

>
>
> Debuggability
>
> This will be included in the larger effort to emulate Forced
> Colors Mode:
> https://bugs.chromium.org/p/chromium/issues/detail?id=1130859&q=owner:kahinds%40microsoft.com&can=2

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1130859%26q%3Downer%253Akahinds%2540microsoft.com%26can%3D2&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339898248%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=M00sR995ztt%2BHpC6%2FxStHXtL3UDX%2BKlJ6sGM46f5MuI%3D&reserved=0>

>
>
>
> Is this feature fully tested by web-platform-tests

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromium.googlesource.com%2Fchromium%2Fsrc%2F%2B%2Fmaster%2Fdocs%2Ftesting%2Fweb_platform_tests.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339898248%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=96r%2BiyczUwADHF2r8aYiYMA0UpvWObWTOu8khCmLZ7A%3D&reserved=0>?

>
> Yes
>
>
> Flag name
>
> --enable-blink-features=ForcedColorsPreserveParentColor
>
>
> Requires code in //chrome?
>
> False
>
>
> Tracking bug
>

> https://bugs.chromium.org/p/chromium/issues/detail?id=1242706 <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1242706&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339908208%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=IlPObZjmag%2FPaJvSdCzEyziw5eBs9jlhr0UkRPaj%2FzQ%3D&reserved=0>

>
>
> Estimated milestones
>
> No milestones specified
>
>
>
> Link to entry on the Chrome Platform Status
>
> https://www.chromestatus.com/feature/4887620095049728

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeature%2F4887620095049728&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339918192%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=O6DtCk5zzReAzAZzw3Hn1NNgI7lBo%2FIqxMga8NI%2Fp2w%3D&reserved=0>

>
> This intent message was generated by Chrome Platform Status

>
>
> TAG review status
>
> Issues open
>
>
> Risks
>
>
>
> Interoperability and Compatibility
>
> Interoperability Risks Gecko has shipped a version of Forced
> Colors Mode without support for ‘forced-color-adjust’.
> Although there is an open bug for adding support
> (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339977921%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=tzENjj0e5InHdFCHOsGKkJ0aIp3ZZ%2BkFAFj81ufPv0U%3D&reserved=0>),

> development has not been started yet. Compatibility Risks We
> are updating the default value of ‘forced-color-adjust’ for
> SVGs in Forced Colors Mode from ‘none’ to
> ‘preserve-parent-color'. This means that SVGs will now
> inherit the used ‘color’ of their parent at computed value
> time. The new behavior will better match author expectation
> and historical SVG behavior in IE and legacy Edge.
>
>
>

> /Gecko/: In development
> (https://bugzilla.mozilla.org/show_bug.cgi?id=1591210
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339987872%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=NCjSfXgllzwEpd0a2J2ampjX4KHv7SzloXBsBR7n%2Bnk%3D&reserved=0>)
>
> /WebKit/: No signal
> (https://lists.webkit.org/pipermail/webkit-dev/2020-December/031642.html
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.webkit.org%2Fpipermail%2Fwebkit-dev%2F2020-December%2F031642.html&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339997838%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=gV%2FyRYjkVmFm7ea7MX1r8hx%2F2q%2FIPa%2FHq1usgiHoGzo%3D&reserved=0>)
>
> /Web developers/: Positive
> (https://github.com/w3c/csswg-drafts/issues/6310
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177339997838%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=5cUT1k9FAjl5Q%2FAVH1gdnGY7%2Ben3GecKfDRieVL02bk%3D&reserved=0>)

>
>
> Debuggability
>
> This will be included in the larger effort to emulate Forced
> Colors Mode:
> https://bugs.chromium.org/p/chromium/issues/detail?id=1130859&q=owner:kahinds%40microsoft.com&can=2

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1130859%26q%3Downer%253Akahinds%2540microsoft.com%26can%3D2&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177340007773%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=47qmQPajcOv4kO5JkVBAm00bVMxwyg4V0b8J%2B7JjCIs%3D&reserved=0>

>
>
>
> Is this feature fully tested by web-platform-tests

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromium.googlesource.com%2Fchromium%2Fsrc%2F%2B%2Fmaster%2Fdocs%2Ftesting%2Fweb_platform_tests.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177340017735%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=iVtvWFCqR612YFRdnPA4ox7OArpJtjwN0lssMaZCymU%3D&reserved=0>?

>
> Yes
>
>
> Flag name
>
> --enable-blink-features=ForcedColorsPreserveParentColor
>
>
> Requires code in //chrome?
>
> False
>
>
> Tracking bug
>

> https://bugs.chromium.org/p/chromium/issues/detail?id=1242706 <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1242706&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177340027688%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=WKYPO5%2BKk7%2Bth%2FyV%2B%2B1XI8zSML9oSqcJq9IExRHhWEI%3D&reserved=0>

>
>
> Estimated milestones
>
> No milestones specified
>
>
>
> Link to entry on the Chrome Platform Status
>
> https://www.chromestatus.com/feature/4887620095049728

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeature%2F4887620095049728&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177340027688%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Ei2xWeY4P3HhNLz%2BRDxgvqBrkBdG%2FHrocj5v%2Bqs%2BQOM%3D&reserved=0>

>
> This intent message was generated by Chrome Platform Status

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2F&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177340037644%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=d51qMITEBu93H1d06hgsrCmW9mPObcvp2QciRwmtp%2FY%3D&reserved=0>.

>
> --
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> To unsubscribe from this group and stop receiving emails
> from it, send an email to blink-dev+...@chromium.org

> <mailto:blink-dev+...@chromium.org>.

> To view this discussion on the web visit
> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/MN2PR00MB068749AC3484CA42C4FE32F0F2869%40MN2PR00MB0687.namprd00.prod.outlook.com

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgroups.google.com%2Fa%2Fchromium.org%2Fd%2Fmsgid%2Fblink-dev%2FMN2PR00MB068749AC3484CA42C4FE32F0F2869%2540MN2PR00MB0687.namprd00.prod.outlook.com%3Futm_medium%3Demail%26utm_source%3Dfooter&data=04%7C01%7CSara.Tang%40microsoft.com%7Cafe9d7d59d5d4f31cb2108d99aefdd45%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637711177340047601%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=LAU7djbsel%2FtSbcqsHBr3aPxQ3hs6QoYuPmolomqjYg%3D&reserved=0>.

>
> --
> You received this message because you are subscribed to the Google
> Groups "blink-dev" group.
> To unsubscribe from this group and stop receiving emails from it,
> send an email to blink-dev+...@chromium.org

> <mailto:blink-dev+...@chromium.org>.

> To view this discussion on the web visit

> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADp2-T8%2By66HWwJP8p2-%2BcvNTQeN1%3DCbP6x9z0Su3ZJBOcNQ3w%40mail.gmail.com
> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADp2-T8%2By66HWwJP8p2-%2BcvNTQeN1%3DCbP6x9z0Su3ZJBOcNQ3w%40mail.gmail.com?utm_medium=email&utm_source=footer>.

>
> --
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> <mailto:blink-dev+...@chromium.org>.

> To view this discussion on the web visit

> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOMQ%2Bw_c52Nx6ZLZyxTOi0HiSrUMMHYj_A0p1owyy%2BpATET5uA%40mail.gmail.com
> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOMQ%2Bw_c52Nx6ZLZyxTOi0HiSrUMMHYj_A0p1owyy%2BpATET5uA%40mail.gmail.com?utm_medium=email&utm_source=footer>.

Sara Tang

unread,

Nov 5, 2021, 6:21:20 PM11/5/21

to Chris Harrelson, Fernando Serboncini, blin...@chromium.org, Alison Maher, Daniel Libby

Thanks Chris, I've filed a request for position here: preserve-parent-color value for forced-color-adjust CSS property · Issue #591 · mozilla/standards-positions (github.com) and I've updated the ChromeStatus to reflect the change.

From: Chris Harrelson <chri...@chromium.org>
Sent: Thursday, November 4, 2021 12:33 PM
To: Fernando Serboncini <fs...@chromium.org>
Cc: Sara Tang <Sara...@microsoft.com>; blin...@chromium.org <blin...@chromium.org>; Alison Maher <Alison...@microsoft.com>; Daniel Libby <dli...@microsoft.com>
Subject: Re: [EXTERNAL] Re: [blink-dev] Intent to Ship: forced-color-adjust: preserve-parent-color

Sara Tang

unread,

Nov 8, 2021, 3:54:15 PM11/8/21

to Manuel Rego Casasnovas, Chris Harrelson, Fernando Serboncini, blin...@chromium.org, Alison Maher, Daniel Libby

Hi Rego,

Although there isn't an explainer for the entire spec, this comment in the TAG review explains the interactions between color-scheme, forced-color-adjust, and color-adjust in more detail: Review Request for CSS Color Adjust Level 1 · Issue #583 · w3ctag/design-reviews · GitHub.

Thanks,

Sara

From: Manuel Rego Casasnovas <re...@igalia.com>
Sent: Friday, November 5, 2021 2:39 AM
To: Chris Harrelson <chri...@chromium.org>; Fernando Serboncini <fs...@chromium.org>
Cc: Sara Tang <Sara...@microsoft.com>; blin...@chromium.org <blin...@chromium.org>; Alison Maher <Alison...@microsoft.com>; Daniel Libby <dli...@microsoft.com>
Subject: Re: [EXTERNAL] Re: [blink-dev] Intent to Ship: forced-color-adjust: preserve-parent-color

On a similar note of what I mentioned in the new "only" keyword for
color-scheme property, I'm having a hard time getting the whole picture

of that spec: https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrafts.csswg.org%2Fcss-color-adjust%2F&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727107985%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=O%2Bik2JIMYM%2FNmQOxCyhqqnzdjJsXBdBLsgRBzlXYzVI%3D&reserved=0

>         <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310%23issuecomment-862517612&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727117936%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=oLNbwQoeNcOZ4NM1zDoIsBPa%2FNxP0xfAV7aKltnhQ%2Bs%3D&reserved=0>on
>         the CSSWG
>         <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310%23issuecomment-862517612&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727117936%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=oLNbwQoeNcOZ4NM1zDoIsBPa%2FNxP0xfAV7aKltnhQ%2Bs%3D&reserved=0>,

>         but your summary and crbug's CL looks more like #1, while your
>         motivation seems like #2.
>
>
>         On Thu, Oct 28, 2021 at 5:45 PM 'Sara Tang' via blink-dev
>         <blin...@chromium.org <mailto:blin...@chromium.org>> wrote:
>
>
>                     Contact emails
>
>             sar...@microsoft.com
>             <mailto:sar...@microsoft.com>, alison...@microsoft.com
>             <mailto:alison...@microsoft.com>
>
>
>                     Explainer
>

>             https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2FAccessibility%2FPreserveParentColor%2Fexplainer.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727117936%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=WJ1L4iKvPttRD2BdV6fL2oW6qinUe16ZsunFU007qs4%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2FAccessibility%2FPreserveParentColor%2Fexplainer.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727127889%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=ltyL25iwmx84yGOpg3oBud3M0pmDGLjGTqYY9NU%2BvIQ%3D&reserved=0>
>
>
>                     Specification
>
>             https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-color-adjust-1%2F%23forced-color-adjust-prop&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727127889%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=0Hc7DfXmeLlNgeOSZKTwExCZ2a4xt12zL9ug9eXeaOo%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-color-adjust-1%2F%23forced-color-adjust-prop&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727127889%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=0Hc7DfXmeLlNgeOSZKTwExCZ2a4xt12zL9ug9eXeaOo%3D&reserved=0>

>
>
>                     Summary
>
>             Adds the ‘preserve-parent-color' value to the
>             ‘forced-color-adjust' CSS property. When Forced Colors Mode
>             is enabled, the ‘color’ property is inherited, and we’ve set
>             ‘forced-color-adjust: preserve-parent-color', the ‘color’
>             property will compute to the used value of its parent.
>             Otherwise, ‘forced-color-adjust: preserve-parent-color'
>             value behaves the same as ‘forced-color-adjust: none’.
>
>
>                     Contact emails
>
>             sar...@microsoft.com
>             <mailto:sar...@microsoft.com>, alison...@microsoft.com
>             <mailto:alison...@microsoft.com>
>
>
>                     Explainer
>

>             https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2FAccessibility%2FPreserveParentColor%2Fexplainer.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727137838%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=28rjL1tcB%2BDuI5dkhO%2B9QiyV3V3h0BgRI8m7ZRckOqM%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2FAccessibility%2FPreserveParentColor%2Fexplainer.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727137838%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=28rjL1tcB%2BDuI5dkhO%2B9QiyV3V3h0BgRI8m7ZRckOqM%3D&reserved=0>
>
>
>                     Specification
>
>             https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-color-adjust-1%2F%23forced-color-adjust-prop&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727137838%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=RhPk533UD3BEL076MB9VqPB9wAh0cfOyGI8EenXq0%2FM%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-color-adjust-1%2F%23forced-color-adjust-prop&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727137838%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=RhPk533UD3BEL076MB9VqPB9wAh0cfOyGI8EenXq0%2FM%3D&reserved=0>

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727147795%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=8ASoNOU2jplLokFsb5ZdxZl11DvFyBU7RHw%2FE17VyYU%3D&reserved=0>.

>
>             The use of ‘currentColor’ when styling an SVG icon is a
>             common pattern used by authors to ensure an accessible
>             experience in Forced Colors Mode. For example, in
>             this sample logo,

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcodepen.io%2Fsomelaniesaid%2Fpen%2FYzqxogg&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727147795%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3t613AaaTC03kko0k6PLgl76mlUTRILECI1BaXhWU%2FM%3D&reserved=0> an

>             author would expect the logo to automatically adjust to use
>             the ‘CanvasText’ system color for ‘fill’ and ‘stroke’ in
>             Forced Colors Mode, as a result of setting each to
>             ‘currentColor’.
>
>             This behavior, however, became broken when we moved from
>             forcing colors at computed value time to used value
>             time: [css-color-adjust-1] Is forced color computed or used
>             value? · Issue #4915 · w3c/csswg-drafts · GitHub

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F4915&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727147795%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=J9rNa9KIDlsHIBmUwIIATAIEHOC1GB%2F0J0umVI7O6Pg%3D&reserved=0>. Instead

> of inheriting ‘CanvasText’, as before, the above sample logo

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcodepen.io%2Fsomelaniesaid%2Fpen%2FYzqxogg&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727157753%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=fv%2BSfhNHjz87nXuF6qHwEgRCkawI5jh3aBRMhwt%2F%2F3M%3D&reserved=0> would

>             inherit the computed ‘color’ value of its parent, resulting
>             in a logo that is no longer readable in Forced Colors Mode.
>
>             The new ‘preserve-parent-color' value was added to address
>             this common SVG use case. By changing the default value of
>             ‘forced-color-adjust’ for SVGs from ‘none’ to
>             ‘preserve-parent-color', SVG icons that make use of
>             ‘currentColor’ will now inherit the used ‘color’ value of
>             its parent, as expected.
>
>             It is important to note that this may break SVGs that expect
>             the opposite inheritance behavior for the ‘color’ property.
>             However, the behavior of `preserve-parent-color` handles the
>             most common SVG use cases, and the behavior better matches
>             legacy implementations of High Contrast Mode.
>
>             *
>             *
>             *
>
>
>                     Blink component
>
>             Blink>CSS

>
>
>                     TAG review status
>
>             Issues open
>
>
>                     Risks
>
>
>
>                     Interoperability and Compatibility
>
>             Interoperability Risks Gecko has shipped a version of Forced
>             Colors Mode without support for ‘forced-color-adjust’.
>             Although there is an open bug for adding support

> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727177658%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=dUT2HpRhen2ul9YrznrhiNMEF2sMyi%2FT7tQlc8YIHhQ%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727177658%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=dUT2HpRhen2ul9YrznrhiNMEF2sMyi%2FT7tQlc8YIHhQ%3D&reserved=0>),

>             development has not been started yet. Compatibility Risks We
>             are updating the default value of ‘forced-color-adjust’ for
>             SVGs in Forced Colors Mode from ‘none’ to
>             ‘preserve-parent-color'. This means that SVGs will now
>             inherit the used ‘color’ of their parent at computed value
>             time. The new behavior will better match author expectation
>             and historical SVG behavior in IE and legacy Edge.
>
>
>
>             /Gecko/: In development

> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727187629%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=PSW0p22F50aP4rE1sz7GCLjTeoZ0uhXGKfJGmL%2B0UjI%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727187629%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=PSW0p22F50aP4rE1sz7GCLjTeoZ0uhXGKfJGmL%2B0UjI%3D&reserved=0>)

>
>
> I don't see much evidence of active development on that issue. How about

> re-using https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fmozilla%2Fstandards-positions%2Fissues%2F463&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727187629%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=F5SwxDXTcSlotgtDgvtSD%2Fc6%2BWnmi6WGF0LI3OcTKJc%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fmozilla%2Fstandards-positions%2Fissues%2F463&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727187629%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=F5SwxDXTcSlotgtDgvtSD%2Fc6%2BWnmi6WGF0LI3OcTKJc%3D&reserved=0> and asking

> for Mozilla to provide a position?
>
>
>
> /WebKit/: No signal

>             (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.webkit.org%2Fpipermail%2Fwebkit-dev%2F2020-December%2F031642.html&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727197592%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Y%2BUrw7DFAbRU1kcjtiGfWZEp5Sl4MeUUWD8pmGIjxz8%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.webkit.org%2Fpipermail%2Fwebkit-dev%2F2020-December%2F031642.html&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727197592%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Y%2BUrw7DFAbRU1kcjtiGfWZEp5Sl4MeUUWD8pmGIjxz8%3D&reserved=0>)
>
>             /Web developers/: Positive
>             (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727197592%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=CnxFwe6xjh5VBbWori1mDD43rsDCEQu9gPmtj8uyea8%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727197592%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=CnxFwe6xjh5VBbWori1mDD43rsDCEQu9gPmtj8uyea8%3D&reserved=0>)

>
>
>                     Debuggability
>
>             This will be included in the larger effort to emulate Forced
>             Colors Mode:

> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1130859%26q%3Downer%3Akahinds%2540microsoft.com%26can%3D2&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727197592%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=sKh6z2YTcmbnU77uUEEJN9CU%2FA2%2FsPU26Jo8eII9MAA%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1130859%26q%3Downer%253Akahinds%2540microsoft.com%26can%3D2&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727207541%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=yuvY3Kb1e1WiXhcwaWPPVH7u6snBLBI%2BBsKR3hjFGuo%3D&reserved=0>

>
>
>
> Is this feature fully tested by web-platform-tests

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromium.googlesource.com%2Fchromium%2Fsrc%2F%2B%2Fmaster%2Fdocs%2Ftesting%2Fweb_platform_tests.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727207541%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=qpfMLWh5G5%2BBj2HoRIun1kxQzRlnV%2BTXJQUM8wtkzEU%3D&reserved=0>?

>
>             Yes
>
>
>                     Flag name
>
>             --enable-blink-features=ForcedColorsPreserveParentColor
>
>
>                     Requires code in //chrome?
>
>             False
>
>
>                     Tracking bug
>

> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1242706&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727207541%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=lcet03t6LSmDozSquf5cL0iZR0BE4BsdYtO%2BbZbyFz4%3D&reserved=0 <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1242706&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727217505%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=cftGZRhz6IuREzVqqMce2Ryl6286iIzo3FApdSIGVEU%3D&reserved=0>

>
>
>                     Estimated milestones
>
>             No milestones specified
>
>
>
>                     Link to entry on the Chrome Platform Status
>

> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeature%2F4887620095049728&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727217505%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=gEnmJTjhjmHTobY55Nvqc9u%2BDG%2F4FMbKbiA4CX6QrCg%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeature%2F4887620095049728&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727217505%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=gEnmJTjhjmHTobY55Nvqc9u%2BDG%2F4FMbKbiA4CX6QrCg%3D&reserved=0>

>
> This intent message was generated by Chrome Platform Status

>
>
>                     TAG review status
>
>             Issues open
>
>
>                     Risks
>
>
>
>                     Interoperability and Compatibility
>
>             Interoperability Risks Gecko has shipped a version of Forced
>             Colors Mode without support for ‘forced-color-adjust’.
>             Although there is an open bug for adding support

> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727247358%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Lj8A32e6Ark8S9unVhcLVzx248gCQaQ6ktIhW3NXfUw%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727247358%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Lj8A32e6Ark8S9unVhcLVzx248gCQaQ6ktIhW3NXfUw%3D&reserved=0>),

>             development has not been started yet. Compatibility Risks We
>             are updating the default value of ‘forced-color-adjust’ for
>             SVGs in Forced Colors Mode from ‘none’ to
>             ‘preserve-parent-color'. This means that SVGs will now
>             inherit the used ‘color’ of their parent at computed value
>             time. The new behavior will better match author expectation
>             and historical SVG behavior in IE and legacy Edge.
>
>
>
>             /Gecko/: In development

>             (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727247358%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Lj8A32e6Ark8S9unVhcLVzx248gCQaQ6ktIhW3NXfUw%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.mozilla.org%2Fshow_bug.cgi%3Fid%3D1591210&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727247358%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Lj8A32e6Ark8S9unVhcLVzx248gCQaQ6ktIhW3NXfUw%3D&reserved=0>)
>
>             /WebKit/: No signal
>             (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.webkit.org%2Fpipermail%2Fwebkit-dev%2F2020-December%2F031642.html&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727257313%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=fmctUjrBHLxgMZOChUgutjJzhwBpclmykRnY5d87VdA%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.webkit.org%2Fpipermail%2Fwebkit-dev%2F2020-December%2F031642.html&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727257313%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=fmctUjrBHLxgMZOChUgutjJzhwBpclmykRnY5d87VdA%3D&reserved=0>)
>
>             /Web developers/: Positive
>             (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727257313%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=GOzmJCu4rj%2FLOh3%2FLgEpllMBs9BcCWa5tuhYaOKzNl0%3D&reserved=0
>             <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F6310&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727257313%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=GOzmJCu4rj%2FLOh3%2FLgEpllMBs9BcCWa5tuhYaOKzNl0%3D&reserved=0>)

>
>
>                     Debuggability
>
>             This will be included in the larger effort to emulate Forced
>             Colors Mode:

> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1130859%26q%3Downer%3Akahinds%2540microsoft.com%26can%3D2&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727267271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=hg55IAmssJyH%2FHw08kHs2h03LdelsONyngsCQs12120%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1130859%26q%3Downer%253Akahinds%2540microsoft.com%26can%3D2&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727267271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=RnyuJs6gmBuuXOB8NOJzcn3gmdn5We6ID%2FtCVzRJp4s%3D&reserved=0>

>
>
>
> Is this feature fully tested by web-platform-tests

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromium.googlesource.com%2Fchromium%2Fsrc%2F%2B%2Fmaster%2Fdocs%2Ftesting%2Fweb_platform_tests.md&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727267271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=ecVl6iC8b7uhGqiZqNhfGQpjX5Uqn03zjPjDRzuL4s0%3D&reserved=0>?

>
>             Yes
>
>
>                     Flag name
>
>             --enable-blink-features=ForcedColorsPreserveParentColor
>
>
>                     Requires code in //chrome?
>
>             False
>
>
>                     Tracking bug
>

> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1242706&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727267271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=kV6PFTCSsNvsCEghFKZYq9O4ZVBVekO2Zx45Z40P0IY%3D&reserved=0 <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1242706&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727277226%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=mN4bSY6nYicE35scEuxy6x8okbCByYBUK7wioXpOnKI%3D&reserved=0>

>
>
>                     Estimated milestones
>
>             No milestones specified
>
>
>
>                     Link to entry on the Chrome Platform Status
>

> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2Ffeature%2F4887620095049728&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727277226%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=13RpX3ruI%2FlqqjOn2gQ2YJkJkCnn%2BWJWcAVKrSlfsqg%3D&reserved=0
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>
> This intent message was generated by Chrome Platform Status

> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2F&data=04%7C01%7CSara.Tang%40microsoft.com%7Cc0b27da6d4424699edac08d9a0456ca4%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637717043727277226%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=P%2F5PQLkMFgZ42LeiP8RC5IKer3EJnGFc6FW3uLFvmpo%3D&reserved=0>.

>
>             --
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>             To unsubscribe from this group and stop receiving emails
>             from it, send an email to blink-dev+...@chromium.org
>             <mailto:blink-dev+...@chromium.org>.
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Chris Harrelson

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Nov 18, 2021, 3:10:52 PM11/18/21

to Sara Tang, Manuel Rego Casasnovas, Fernando Serboncini, blin...@chromium.org, Alison Maher, Daniel Libby

Hi, it looks like there was a useful conversation on the Mozilla standards position issue, and I think some more spec discussion occurred as a result. Is that accurate? Should we wait for those questions to be resolved at the CSSWG?

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Alison Maher

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Nov 19, 2021, 4:29:44 PM11/19/21

to blink-dev, Chris Harrelson, Manuel Rego, fs...@chromium.org, blin...@chromium.org, Alison Maher, dli...@microsoft.com, Sara Tang

Hi Chris,

That is correct, based on the Mozilla feedback, it sounds like there will be some spec discussions to be had. I'd be surprised if some of the original decisions around used/computed value time handling of Forced Colors will get overturned at this point, but we should probably hold off until a final CSSWG resolution is made.

Thanks,
Alison

Chris Harrelson

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Nov 19, 2021, 4:34:33 PM11/19/21

to Alison Maher, blink-dev, Manuel Rego, fs...@chromium.org, Alison Maher, dli...@microsoft.com, Sara Tang

Ok sounds good. Let us know when we should re-review.

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Danny Holly

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Nov 21, 2021, 4:10:54 PM11/21/21

to blink-dev, Sara Tang, Alison Maher, dli...@microsoft.com

cause no harm

Sara Tang

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Jun 15, 2022, 5:46:09 PM6/15/22

to blink-dev, Danny Holly, Sara Tang, Alison Maher, dli...@microsoft.com

Hi, reviving this thread as the CSSWG resolution at [css-color] [css-color-adjust] Make system colors fully resolve (but flag they were system colors) thus reversing the resolution of #3847 · Issue #6773 · w3c/csswg-drafts (github.com) has been reached (though the standards posiiton for this particular feature hasn't been updated yet). preserve-parent-color value for forced-color-adjust CSS property · Issue #591 · mozilla/standards-positions (github.com).

To summarize,

- If both system colors and forced colors were resolved at compute time, `preserve-parent-color` would not be needed. This is similar to Mozilla, which gets the behavior of `preserve-parent-color` "for free".

- The resolution of #6773 is to resolve system colors at compute time. Forced color are still resolved at used value time.

- Thus, `preserve-parent-color` is still needed.

I believe we should now be unblocked to ship `preserve-parent-color` :)

Sara

Daniel Bratell

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Jun 22, 2022, 12:05:32 PM6/22/22

to Sara Tang, blink-dev, Danny Holly, Sara Tang, dli...@microsoft.com

LGTM1

/Daniel

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Chris Harrelson

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Jun 22, 2022, 12:10:55 PM6/22/22

to Daniel Bratell, Sara Tang, blink-dev, Danny Holly, Sara Tang, dli...@microsoft.com

LGTM2

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Mike Taylor

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Jun 22, 2022, 12:54:41 PM6/22/22

to Chris Harrelson, Daniel Bratell, Sara Tang, blink-dev, Danny Holly, Sara Tang, dli...@microsoft.com

LGTM3

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Joe Medley

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Jun 22, 2022, 1:20:13 PM6/22/22

to Mike Taylor, Chris Harrelson, Daniel Bratell, Sara Tang, blink-dev, Danny Holly, Sara Tang, dli...@microsoft.com

When do you hope to ship?

Joe Medley | Technical Writer, Chrome DevRel | jme...@google.com | 816-678-7195

If an API's not documented it doesn't exist.

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Sara Tang

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Jul 19, 2022, 3:17:23 PM7/19/22

to Joe Medley, Mike Taylor, Chris Harrelson, Daniel Bratell, saraztang, blink-dev, Danny Holly, Alison Maher

Hi Joe,

We are aiming for version 106!

Sara

From: Joe Medley <jme...@google.com>
Sent: Wednesday, June 22, 2022 10:19 AM
To: Mike Taylor <mike...@chromium.org>
Cc: Chris Harrelson <chri...@chromium.org>; Daniel Bratell <brat...@gmail.com>; saraztang <sara...@gmail.com>; blink-dev <blin...@chromium.org>; Danny Holly <dholl...@gmail.com>; Sara Tang <Sara...@microsoft.com>; Alison Maher <Alison...@microsoft.com>
Subject: [EXTERNAL] Re: [blink-dev] Re: Intent to Ship: forced-color-adjust: preserve-parent-color

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