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From: Tomas Hlavaty <tom@logand.com>
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Subject: Re: Emacs Survey: Toolbars
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Cc: Stefan Monnier <monnier@iro.umontreal.ca>,
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To: Yuri Khan <yuri.v.khan@gmail.com>
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On Sat 26 Dec 2020 at 03:32, Yuri Khan <yuri.v.khan@gmail.com> wrote:

> On Sat, 26 Dec 2020 at 01:29, Tomas Hlavaty <tom@logand.com> wrote:
>
>> >> Convert the color's YUV and invert the Y.
>> >
>> > Possibly better: keep the hue and saturation and recalculate luminance
>> > to preserve the relative contrast to background color.
>>
>> Is there a name for that or more detailed description I could follow?
>
> Same old: https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef

Thanks!  I'll have a look.