Re: Emacs Survey: Toolbars

[Yuri Khan]

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