- From: Laura Carlson <laura.lee.carlson@gmail.com>
- Date: Tue, 3 Nov 2015 15:36:49 -0600
- To: Shawn Henry <shawn@w3.org>
- Cc: public-low-vision-a11y-tf@w3.org
Hi Shawn, It is an issue for people with low vision who do not use a screen reader but rather Windows High Contrast Mode. Check what Jon wrote back in July, "...This forces users with low vision who use high contrast or ignore colors to completely turn off CSS for the page. Requiring the user to turn off CSS to simply have access to a meaningful image that the developer should not have made a presentation layer image is an issue for me." https://lists.w3.org/Archives/Public/w3c-wai-gl/2014JulSep/0090.html Me too. As Aurelien Levy said "I think there is two things that may lead to think it's not a failure : - there is a sufficient technique allowing to use hidden text with css http://www.w3.org/TR/WCAG20-TECHS/C7.html (so same technique but in one case is a failure and in an other case it's not) - for me an association with the guideline 1.3 is missing because using user css or high contrast mode is clearly a case where content is presented in different ways and it must be without losing information or structure." https://lists.w3.org/Archives/Public/w3c-wai-gl/2014JulSep/0091.html Thanks, Laura On 11/3/15, Shawn Henry <shawn@w3.org> wrote: > Laura Carlson wrote: >> WCAG has Technique F3: Failure of Success Criterion 1.1.1 due to using CSS >> to include images that convey important information > > Right! Thanks for the reminder. > > So this issue is not specific to low vision. > > ~Shawn > > > > Laura Carlson wrote: >> Hi Shawn, >> >> The fundamental user issue is that CSS background images in HCM vanish >> and are not perceivable. >> >> It could potentially be solved by any of the 3. >> >> WCAG has Technique F3: Failure of Success Criterion 1.1.1 due to using >> CSS to include images that convey important information >> http://www.w3.org/TR/WCAG20-TECHS/F3.html >> >> Kindest Regards, >> Laura >> >> On 10/28/15, Shawn Henry <shawn@w3.org> wrote: >>> Re below: Is the fundamental issue that: >>> 1. images that provide contextual information should not be included via >>> CSS >>> background? >>> *or* >>> 2. high contrast mode (HCM) and other setting should not turn off >>> background >>> images? >>> *or* >>> 3. users should have the option of turning background images on or off >>> in >>> HCM and other settings? >>> *or* >>> 4. other... >>> >>> >>> >>> On 10/28/2015 10:52 AM, Laura Carlson wrote: >>>> Hi Shawn Jon, and all, >>>> >>>> Good catch, Jon. That is one of our use cases page. It is currently >>>> the second point under color and contrast with the unique identifier >>>> [Laura, UC-7] . >>>> https://www.w3.org/WAI/GL/low-vision-a11y-tf/wiki/User_stories_-_use_cases#Color_and_Contrast >>>> >>>> It might be good to include the unique identifier [Person, UC-#] from >>>> the "User stories - use cases" on the user requirements table for >>>> reference, mapping and to be sure we don't miss others, which should >>>> be included. >>> >>> Done (after I post the up date :-). >>> ~Shawn >>> >>>> >>>> Thanks. >>>> >>>> Best Regards, >>>> Laura >>>> >>>> On 10/28/15, Jonathan Avila <jon.avila@ssbbartgroup.com> wrote: >>>>> Shawn, I wanted to discuss another potential item for the user >>>>> requirements >>>>> - what about removal of background/non-decorative images. That is >>>>> a11y >>>>> features such as High contrast in Windows will remove background >>>>> images >>>>> that >>>>> are seen as decorative from the page content. This is an issue when >>>>> background image techniques are incorrectly used by developers with >>>>> meaningful images and then content is missing. If this is already >>>>> covered - >>>>> please excuse this note. >>>>> >>>>> Best Regards, >>>>> >>>>> Jonathan >>>>> >>>>> -- >>>>> Jonathan Avila >>>>> Chief Accessibility Officer >>>>> SSB BART Group >>>>> jon.avila@ssbbartgroup.com<mailto:jon.avila@ssbbartgroup.com> >>>>> Phone 703.637.8957 >>>>> Follow us: Facebook<http://www.facebook.com/#!/ssbbartgroup> | >>>>> Twitter<http://twitter.com/#!/SSBBARTGroup> | >>>>> LinkedIn<http://www.linkedin.com/company/355266?trk=tyah> | >>>>> Blog<http://www.ssbbartgroup.com/blog> | >>>>> Newsletter<http://eepurl.com/O5DP> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > > -- Laura L. Carlson
Received on Tuesday, 3 November 2015 21:37:17 UTC