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Re: Contrast and Color Accessibility, Understanding WCAG 2 Contrast and Color Requirements

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From: Alastair Campbell
Date: Dec 8, 2018 6:25PM

> * The decision tree of pass/fail and the assumptions below that Alastair wrote at https://alastairc.ac/tests/wcag21-examples/non-text-contrast.html <https://alastairc.ac/tests/wcag21-examples/non-text-contrast.html>.

There's a version of that under the "Testing principles" in the
understanding document. It probably needs an update, but hopefully
that meets the same purpose.

> * Examples with a detailed explanation in clear language that lead to the conclusion of pass or fail, like some of the examples Jared shows at https://webaim.org/temp/1-4-11examples.htm <https://webaim.org/temp/1-4-11examples.htm>.

That certainly helps, but to do that with reasonable coverage of all
the different component types (considering that was just for buttons &
hover states), is a huge undertaking!

The top of the Understanding doc now has plenty of examples [1], and I
think we (the working group) need to focus on making sure the core
explanations and advice are as clear and complete as we can. With that
in place, it is a lot easier for others (like the good folk at Webaim
and the Education & Outreach group) to provide focused tutorial
material that is easier to digest.

Having said that, we obviously will try to improve the understanding
documents, so thank you for pitching in :-)

-Alastair

1] temporary link for the updated document:
http://htmlpreview.github.io/?https://github.com/w3c/wcag/blob/non-text-contrast-updates/understanding/21/non-text-contrast.html
When that disappears it should be published on the official location soon after:
https://www.w3.org/WAI/WCAG21/Understanding/non-text-contrast.html