- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Tue, 27 Feb 2018 14:48:46 -0600
- To: Alastair Campbell <acampbell@nomensa.com>
- Cc: Glenda Sims <glenda.sims@deque.com>, public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
- Message-ID: <CA+=z1WmgE8weWpDRHGRE6-KXGFPacpNdQGtJB+hj1cfWGLEK=Q@mail.gmail.com>
I think the *principle of “delete areas of non-contrast” should be part of the testing.* On Tue, Feb 27, 2018 at 3:29 AM, Alastair Campbell <acampbell@nomensa.com> wrote: > Hi Glenda, > > > > It looks like this is a case of adding a border that reduces contrast!? > > > > The flexibility is about the graphical object, so you can use either the > white arrow, or the purple border. > > > > The main answer to your question is: *Use the principle of “delete areas > of non-contrast”,* if you remove the pink border (e.g. make it white or > purple), does that pass? > > > > I.e. select the white arrow and ignore the pink border, so white against > purple. > > > > Having “deleted” the pink border, it would still need to make sense as a > graphical object, you should still understand it. > > For example, if the pink border was a larger area, and made an arrow in > the opposite direction (so white pointed right, within a pink arrow that > pointed left), you would lose information and it would not pass. > > > > That makes for an interesting test-case… thanks! > > > > -Alastair > > > > > > > > *From: *Glenda Sims > > > > Dear LVTF, > > > > How do we test for contrast on a non-text icon that looks like this: > > - white (#FFFFFF) arrow with a > - pink (#FF5FFF) outline on a > - purple (#5B30FF) background > > [image: Inline image 1] > > > > In looking at the 3 colors and contrasting them with each other: > > - white (#FFFFFF) to purple (#5B30FF) = 6.3 to 1 color contrast > - white (#FFFFFF) to pink (#FF5FFF) = 2.5 to 1 color contrast > - pink (#FF5FFF) to purple (#5B30FF) = 2.5 to 1 color contrast > > Do I have to fail this icon for WCAG 2.1 SC 1.4.11 Non-Text Contrast > because the pink outline of the arrow does not contrast enough with the > purple background? > > > > Or...am I allowed to ignore the pink outline..and compare the white arrow > to the purple background and let this arrow icon pass 1.4.11 Non-Text > Contrast. > > > > My brain keeps telling me I should let this pass...but I'm not sure how to > articulate that it is okay to ignore the pink outline. Why do I think it > is okay to ignore the outline? Because when I squint, I can almost make > the pink outline disappear. But how would I explain to a tester...that it > is okay to ignore the outline??? > > > > G > > > > > > glenda sims | team a11y lead | deque.com | 512.963.3773 > <(512)%20963-3773> > *web for everyone. web on everything.* - w3 goals > > [image: IAAP International Association of Accessibility Professionals: > Certified Professional in Accessibility Core Competencies (CPACC)] > > > -- Jim Allan, Accessibility Coordinator Texas School for the Blind and Visually Impaired 1100 W. 45th St., Austin, Texas 78756 voice 512.206.9315 fax: 512.206.9452 http://www.tsbvi.edu/ "We shape our tools and thereafter our tools shape us." McLuhan, 1964
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Received on Tuesday, 27 February 2018 20:49:14 UTC