Customize the colour of dropdown background in zelos theme

[Jing An Tew]

As mentioned in the title, is there a way of customizing the dropdown background colour in the zelos theme. It currently defaults to the same colour as the block colour as shown in 

the image below.

Thanks,

Jing An

[Beka Westberg]

Hello Jing An,

You can customize the background color of the dropdown div by creating a custom dropdown field subclass, and registering over the built in field.

You will want to override `showEditor` and call `dropdownDiv.setColour` with the colors you want.

```

override showEditor_(e) {

  super.showEditor_(e);

  dropdownDiv.setColour(/* my colour */);

}

```

I hope that helps! If you have any further questions please reply =)

--Beka

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