On Wednesday, 19 July 2023 at 05:19:40 BST, Werner LEMBERG <w...@gnu.org> wrote: > > 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. Population health statistics - a few percent of Caucasian males are red-green colour-blind. I guess Brad is one of them. So I draw a pink smiley face on a pale green background, you won't be able to tell there is a smiley face. If we are talking about text fonts, using colour fonts to annotate Arabic for proper pronunciation of passages from the Quran... is it possible to intentionally create a font that would cause colour blind non-native people to mis-pronounce certain words and create offences / blasphemy? :-).
