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Re: [EXT] Correction for colour contrast fail in a chart


From: Dolenko, Kristen
Date: Oct 19, 2022 10:36AM

Thank you so much for your prompt reply, Jared.


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From: WebAIM-Forum < <EMAIL REMOVED> > On Behalf Of Jared Smith
Sent: October 19, 2022 12:34 PM
To: WebAIM Discussion List < <EMAIL REMOVED> >
Subject: Re: [WebAIM] [EXT] Correction for colour contrast fail in a chart


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Welcome to the forum!

The Non-text Contrast success criterion in WCAG applies to "Parts of graphics required to understand the content." If you provide a text version of the content conveyed via the graphical chart, then the chart is no longer "required to understand the content", so thus is not required to provide the 3:1 contrast. Figure 20 at https://www.w3.org/WAI/WCAG21/Understanding/non-text-contrast.html presents a similar scenario.

With this all said, the chart and its components should be given sufficient contrast for optimal accessibility and usability, even if WCAG may not require it.