Thread Subject: Color
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From: Gregg Vanderheiden
Date: Sat, Aug 18 2007 11:25 PM
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Was looking to harmonize WCAG with TEITAC but I think new WCAG proposal
might be better
WCAG proposal
Any information <http://www.w3.org/WAI/GL/WCAG20/#informationbycolordef>
that is conveyed by difference in color is also simultaneously visually
evident without the color difference.
TEITAC language
Color must not be used as the only visual means of conveying information,
indicating an action, prompting a response, or distinguishing a visual
element.
Disadvantages of TEITAC
1) longer
2) uses list of things (which is always dangerous in provision --
though useful in a note)
3) If I use blue text to convey information - it should not trigger
this (if the blue has no meaning). However this language in past WCAGs has
caused people to believe that they could not convey information in color
(rather than by color).
Gregg
------------------------
Gregg C Vanderheiden Ph.D.
Professor - Depts of Ind. Engr. & BioMed Engr.
Director - Trace R & D Center
University of Wisconsin-Madison
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