RE: Color contrast question - button background

Hi Aleta,

The fine print of the standard only mentions about the contrast ratio of text vs background. However, keeping in mind the larger intention of the guideline (to help people with color recognition issues distinguish between elements), one should ideally maintain the color contrast ratio for every object / element on the UI. I second Terry's response to your query.

Regards,
Vinil Peter, PMP



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On Apr 18, 2018, 7:24 PM, at 7:24 PM, "SALES, TERRY LYNN" <terrylynn.sales@cbp.dhs.gov> wrote:
>The letter of the standard is for text, however, I apply it to anything
>that has meaning and would cause an issue if not recognizable by a
>user.  Icons used as links, buttons like your example, etc.  If the
>user would miss a function or action available to others by not being
>able to distinguish an item’s presence, I make them fix the contrast.
>
>Terry Lynn (TL) Sales
>DHS Trusted Tester, CMII, PMP
>DHS/CBP/OIT/CSPD
>571-468-5271 Desk
>703-945-2777 B’Berry
>
>From: Aleta Moses [mailto:aletamoses@gmail.com]
>Sent: Wednesday, April 18, 2018 9:23 AM
>To: w3c-wai-ig@w3.org
>Subject: Color contrast question - button background
>
>
>
>Hi there,
>
>I have a question about button color contrast.
>
>I am familiar with success criterion 1.4.3 Contrast (Minimum): The
>visual presentation of text<http://www.w3.org/TR/WCAG20/#textdef> and
>images of text<http://www.w3.org/TR/WCAG20/#images-of-textdef> with a
>contrast ratio<http://www.w3.org/TR/WCAG20/#contrast-ratiodef> of at
>least 4.5:1, for normal text.
>
>However I have been told by colleagues recently that there is also a
>requirement for button color contrast  with the background that it is
>placed on.
>
>If there is insufficient color contrast using 4.5:1 between a button
>and its background , would this be considered an accessibility failure?
>Or is text and background colour sufficient?
>
>If there is a requirement, is there any instruction that would apply it
>to some buttons and not others, or should it be applied to all on a
>site?
>
>Any advice or guidance would be much appreciated.
>
>Thanks,
>Aleta