- From: David MacDonald <david100@sympatico.ca>
- Date: Thu, 28 Jul 2016 17:38:29 -0400
- To: Janina Sajka <janina@rednote.net>
- CC: Eric Eggert <ee@w3.org>, John Foliot <john.foliot@deque.com>, WCAG <w3c-wai-gl@w3.org>, W3C WAI Accessible Platform Architectures <public-apa@w3.org>
- Message-ID: <BLU436-SMTP17AC92EBC3835728565339FE000@phx.gbl>
I've used the colour contrast analyzer to measure contrast of text sitting on a transparent background but I choose the sample that had the lowest contrast as my test point. Cheers, David MacDonald *Can**Adapt* *Solutions Inc.* Tel: 613.235.4902 LinkedIn <http://www.linkedin.com/in/davidmacdonald100> twitter.com/davidmacd GitHub <https://github.com/DavidMacDonald> www.Can-Adapt.com <http://www.can-adapt.com/> * Adapting the web to all users* * Including those with disabilities* If you are not the intended recipient, please review our privacy policy <http://www.davidmacd.com/disclaimer.html> On Thu, Jul 28, 2016 at 3:53 PM, Janina Sajka <janina@rednote.net> wrote: > FYI, APA currently has an open CfC on a draft comment requesting an > Accessibility Impact section in the CSS spec. The request is, with some > wording tweaks, essentially the same as at: > > http://lists.w3.org/Archives/Public/public-apa/2016Jul/0040.html > > If the above is incorrect, it would be helpful to know that before next > Wednesday 3 August. > > Janina > > > Eric Eggert writes: > > On 28 Jul 2016, at 19:12, John Foliot wrote: > > > > > 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 > > > > Just skimmed the document and found this contrast CSS function which has > a > > related luminance computation – this might be interesting to see how that > > works with the WCAG 2.0 definition. I think alpha transparency would be > > really good to cover in 2.1… > > > > http://www.w3.org/TR/css-color-4/#contrast-adjuster > > > > > > > > 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 > > > > > > > > > > -- > > > > Eric Eggert > > Web Accessibility Specialist > > Web Accessibility Initiative (WAI) at World Wide Web Consortium (W3C) > > > > -- > > Janina Sajka, Phone: +1.443.300.2200 > sip:janina@asterisk.rednote.net > Email: janina@rednote.net > > Linux Foundation Fellow > Executive Chair, Accessibility Workgroup: http://a11y.org > > The World Wide Web Consortium (W3C), Web Accessibility Initiative (WAI) > Chair, Accessible Platform Architectures http://www.w3.org/wai/apa > > > >
Received on Thursday, 28 July 2016 21:39:01 UTC