- From: Tobias Bengfort via GitHub <sysbot+gh@w3.org>
- Date: Thu, 27 Jul 2017 12:10:09 +0000
- To: public-css-archive@w3.org
> > Ignoring the context would mean to assume worst case. > > "Worst case" is fully transparent, which automatically fails, so we can't do that. By that I meant that in a situation like [white text on `rgba(0,0,0,0.5)`](https://leaverou.github.io/contrast-ratio/#white-on-rgba%280%2C0%2C0%2C.5%29), we would need to know the color *behind that* to caluclate the contrast. Unfortunately we do not know it. So in order to still guarantee sufficient contrast, we would have to check the worst possible case (in this case white text on `rgba(0,0,0,0.5)` on white, which is 4). -- GitHub Notification of comment by xi Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/1628#issuecomment-318343768 using your GitHub account
Received on Thursday, 27 July 2017 12:10:09 UTC