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WCAG 2and high contrast

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From: Roger Hudson
Date: Oct 4, 2015 6:42PM

Hi



I am in a bit of a quandary about the need to ensure images/icons still meet
WCAG 2 when viewed in high contrast, and would love to get the opinion of
some other list members.



Assume an important icon is an image or background image and there is a
non-visible text alternative that can be readout by screen readers. When the
page is viewed using a standard Windows display, the icon is clearly
visible. However, when Windows is used to change the display to high
contrast the inline image and the background image disappears.



My question is; would the disappearance of the image be a failure to comply
with SC 1.4.3 Colour contrast, or any other WCAG 2 Success Criteria?



Interestingly, this does not appear to happen with Macs. The iOS high
contrast doesn't seem to affect background images.



Thanks,



Roger





Roger Hudson

Web Usability

Mobile: 0405 320 014

Phone: 02 9568 1535

Web: www.usability.com.au

Blog: www.dingoaccess.com

Twitter: http://twitter.com/rogerhudson

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