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Thread: Contrast issue
Number of posts in this thread: 4 (In chronological order)
From: John S. Britsios
Date: Thu, Apr 27 2006 10:20PM
Subject: Contrast issue
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For our site's main navigation we have white text over a graphic with a
gradient from darker to lighter orange.
The contrast here is not very great. See here: http://www.webnauts.net
However, if the graphics are turned off in the browser, or the style
sheet is turned off, the contrast is 100% efficient.
Is this an accessibility violation?
Thanks,
John
--
John S. Britsios
Web Architect & Marketing Consultant
Webnauts Net
Koblenzer Str. 37A
D-33613 Bielefeld
Telephone: (+49) 0521 - 325 99 97
Email: = EMAIL ADDRESS REMOVED = Web address: http://www.webnauts.net
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From: Glenda Watson Hyatt
Date: Thu, Apr 27 2006 10:30PM
Subject: RE: Contrast issue
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John S. Britsios writes:
For our site's main navigation we have white text over a graphic with a
gradient from darker to lighter orange.
The contrast here is not very great. See here: http://www.webnauts.net
However, if the graphics are turned off in the browser, or the style
sheet is turned off, the contrast is 100% efficient.
Is this an accessibility violation?
Glenda muses:
I'm not sure if it is a 'violation' per se, but I'm thinking people with
colour blindness or low vision, who surf with the graphics or stylesheets
turned on, may have difficulty seeing the white on orange. White on purple
may be more contrasting.
IMHO.
Glenda
Glenda Watson Hyatt, Principal
Soaring Eagle Communications
Accessible websites. Accessible content. Accessible solutions.
www.webaccessibility.biz
Watch for my autobiography I'll Do It Myself due out November 2006!
http://www.booksbyglenda.com/
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From: Steven Faulkner
Date: Thu, Apr 27 2006 10:50PM
Subject: RE: Contrast issue
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I would say it does not conform to WCAG 1.0 checkpoint 2.2 (at priority
3)- Ensure that foreground and background color combinations provide
sufficient contrast when viewed by someone having color deficits or when
viewed on a black and white screen.
I tested it (with the CCA 1.1
http://www.wat-c.org/tools/CCA/1.1/index.html) using the W3C suggested
algorithms for colour visibility and both the darkest and lightest parts
of the gradient provide poor colour visibility.
John wrote:
> However, if the graphics are turned off in the browser, or the style
> sheet is turned off, the contrast is 100% efficient.
I think this is beyond the point, users should not need to turn their
style sheets or graphics off to compensate for poor contrast.
with regards
Steven Faulkner
Web Accessibility Consultant
vision australia - information & library service
454 Glenferrie Road
Kooyong Victoria 3144
Phone: (613) 9864 9281
Fax: (613) 9864 9210
Email: = EMAIL ADDRESS REMOVED =
www.accessibleinfo.org.au | www.wat-c.org
Download the Web Accessibility Toolbar
[http://www.visionaustralia.org.au/ais/toolbar/]
Vision Australia was formed through the merger of the Royal Blind
Society
NSW, the Royal Victorian Institute for the Blind, Vision Australia
Foundation and the National Information & Library Service.
ABN: 67 108 391 831 ACN: 108 391 831
>
From: John S. Britsios
Date: Tue, May 02 2006 6:20AM
Subject: Re: Contrast issue
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Thank you Steven and everyone else here who have respond to our question.
The next thought of our was, while we would like to keep our colors,
would the problem be solved,
if we would provide an alternative "High Contrast" version, adding a
link to that after the link "Skip to Main Content"?
Thanks in advance again for your kind responses.
Best wishes,
John
Steven Faulkner wrote:
> I would say it does not conform to WCAG 1.0 checkpoint 2.2 (at priority
> 3)- Ensure that foreground and background color combinations provide
> sufficient contrast when viewed by someone having color deficits or when
> viewed on a black and white screen.
>
> I tested it (with the CCA 1.1
> http://www.wat-c.org/tools/CCA/1.1/index.html) using the W3C suggested
> algorithms for colour visibility and both the darkest and lightest parts
> of the gradient provide poor colour visibility.
>
> John wrote:
>
>> However, if the graphics are turned off in the browser, or the style
>> sheet is turned off, the contrast is 100% efficient.
>>
>
> I think this is beyond the point, users should not need to turn their
> style sheets or graphics off to compensate for poor contrast.
>
>
> with regards
>
> Steven Faulkner
> Web Accessibility Consultant
> vision australia - information & library service
> 454 Glenferrie Road
> Kooyong Victoria 3144
> Phone: (613) 9864 9281
> Fax: (613) 9864 9210
> Email: = EMAIL ADDRESS REMOVED =
> www.accessibleinfo.org.au | www.wat-c.org
>
> Download the Web Accessibility Toolbar
> [http://www.visionaustralia.org.au/ais/toolbar/]
>
> Vision Australia was formed through the merger of the Royal Blind
> Society
> NSW, the Royal Victorian Institute for the Blind, Vision Australia
> Foundation and the National Information & Library Service.
> ABN: 67 108 391 831 ACN: 108 391 831
>
>
>
>
>>