Color Contrast and Transparency | WCAG 2.1

Hi.

A question/comment for the Working Group: have we contemplated changes (in
any of SC, Understanding or Techniques) that addresses the impact of Alpha
Transparency of colors and the impact on color contrast and accessibility?
Has any of the 3 current Task Forces covered this in any fashion?

As part of an Action Item[*] I have at the APA, I have been asked to reach
out to WCAG WG as there is a recognized need for techniques to measure
color contrast with alpha layer related to
https://www.w3.org/tr/css-color-4/ css color module level 4

If none of the TF's have looked at this to date, Andrew & Josh can we get
this logged as an action item for the WCAG WG? As well, if we have any
questions or concerns around any of this, we (APA) already have some time
blocked out at TPAC with the CSS WG, and that would be the time to bring
forward those issues. Hoping to flesh this out between this week and
September.

Cheers!

JF

[* https://www.w3.org/WAI/APA/track/actions/2066 - link may not be open to
all to see, but the gist of the issue is covered in this email.]

-- 
John Foliot
Principal Accessibility Strategist
Deque Systems Inc.
john.foliot@deque.com

Advancing the mission of digital accessibility and inclusion