Re: COLRv1 to gray/alpha question (& color-blindness question)

[Werner LEMBERG]

> >  A somewhat related question - colour fonts are used beyond
> >  emoji's. While there are 5 kinds of emoji fonts now, and most
> >  people are using one of 4... but if you check Google Fonts, there
> >  are 10 colour fonts, one is emoji, but 6 are Arabic (useful for
> >  annotating the Quran...) and 3 are Latin. So there are intentions
> >  for text fonts. A few percents of western male population is
> >  color-blind. Colour-blindness is one of the most common eye
> >  problems, after short-sightedness :-).
> 
> I’m colour-blind, but not sure I understand what you’re asking
> here. None of the colour fonts on Google Fonts seem obviously
> difficult to read for me.

Let's assume that you can't discern colors A and B, where both map to
exactly the same gray value C (or to almost identical values).  If a
glyph uses those two colours exclusively, you will have problems with
both a colour and a gray-level version of it.


    Werner