On Tue, 28 Feb 2023 17:28:35 -0000, Max Demian <
max_d...@bigfoot.com> wrote:
> On 28/02/2023 15:55, John Larkin wrote:
>> On Tue, 28 Feb 2023 13:39:53 +0000, Max Demian
>> <
max_d...@bigfoot.com> wrote:
>>
>>> On 27/02/2023 20:55, NY wrote:
>>>> "Commander Kinsey" <
C...@nospam.com> wrote in message
>>>> news:op.101j6...@ryzen.home...
>>>
>>>>> So they couldn't explain the difference in colour of a lettuce and the
>>>>> sky? WTF?
>>>>
>>>> Exactly. It's weird that they survived for so long without words to
>>>> differentiate colours which most of use see as being different. The
>>>> various colours at the blue end of the rainbow (blue, indigo, violet)
>>>> are not as easy to differentiate, and I can understand *those* being
>>>> thought of as various shades of blue, but red, orange, yellow, green,
>>>> blue are all colours that are fairly distinct and deserve individual names.
>>>
>>> Who decide what are distinct colours anyway? To my way of thinking,
>>> there are six /distinct/ colours in the spectrum, red, orange, yellow,
>>> green, blue and violet.
>>>
>>> Indigo was added by Newton to make it up to seven, which he regarded as
>>> a magic number.
>>
>> Human cone cells come in three wavelengths, roughly r-g-b, so if we
>> name more colors it's arbitrary.
>
>
https://en.wikipedia.org/wiki/Cone_cell
>
> From the diagram on the right, it's more like blue, greeny-yellow and
> yellow if you measure the sensitivities at different frequencies.
I call bullshit. If the lowest frequency detector was yellow, how do we see red? And why does the RGB system on TVs work so well?
> We can perceive a lot more colours by comparing the relative signals
> from the different cones.
I wonder why women tend to be more colour fussy? Are they being fussy or accurate?
> How we name them is up to us, according to how important they are.
>
>> Retinas vary a lot between individuals too, especially males.
>
> Many (mostly male) humans have only two kinds of cones: blue and yellow,
> which is what most mammals have.
It's nowhere near "many".
> Males with just the two kinds of cones (referred to a red/green
> colour-blind) can see about three distinct colours in the spectrum
> instead of six.
Females sometimes have 4.