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Re: WCAG 2and high contrast

for

From: Kevin Prince
Date: Oct 5, 2015 5:44PM

It's probably worth returning to the intent of the checkpoint too "The intent of this Success Criterion is to provide enough contrast between text and its background so that it can be read by people with moderately low vision (who do not use contrast-enhancing assistive technology)."
That would both clearly show that this isn't a violation of 1.4.3 and also point to Paul's discussion as to a bug in Windows.

As long as the information conveyed, or action carried out, by the missing icon is apparent elsewhere than you have multiple ways and can still return to Home or see that the site belongs to "Acme" whether their logo is there or not.

Kev
Access1in5
0212220638
039290692
Independent Accessibility and IT Consultancy.



> On 6/10/2015, at 10:35, Paul J. Adam < <EMAIL REMOVED> > wrote:
>
> Windows High Contrast mode should not hide any images that are part of focusable elements. Or if Win HCM does hide the image then it should display the accessible name of the element from the accessibility API.
>
> I would say it's a bug in Windows High Contrast Mode if it hides a focusable element's image without displaying the accessible name of the element. No other high contrast modes hide background images, e.g. OS X/iOS high contrast modes and ZoomText Screen Magnifier don't do this.
>
> Paul J. Adam
> Accessibility Evangelist
> www.deque.com
>
>> On Oct 4, 2015, at 7:42 PM, Roger Hudson < <EMAIL REMOVED> > wrote:
>>
>> 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
>>
>> Email: <EMAIL REMOVED>
>>
>>
>>
>>
>>
>> >> >> >> >
> > > >