Thread Subject: Re: Color
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From: Gregg Vanderheiden
Date: Tue, Aug 14 2007 12:25 PM
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It was a typo / misso in ISO and ANSI.
Everyone knew what it meant and no one noticed the loophole. It was when
people started adding "including markup" that it jumped out at us. But too
late.
RE your suggestions: BOTH would be possible with the suggested wording I
sent.
But with our current proposed TEITAC wording - you could also have it just
be programmatically determinable which would not help anyone. (that is
already required by other provisions for people who are blind - and it does
not address the problem for people who are color blind)
Gregg
-- ------------------------------
Gregg C Vanderheiden Ph.D.
> -----Original Message-----
> From: = EMAIL ADDRESS REMOVED =
> [mailto: = EMAIL ADDRESS REMOVED = ] On Behalf
> Of Andi Snow-Weaver
> Sent: Tuesday, August 14, 2007 11:28 AM
> To: TEITAC Web/Software Subcommittee
> Subject: Re: [teitac-websoftware] Color
>
> Gregg,
>
> We discussed the WCAG 2.0 provision at length and did not
> reach agreement to adopt it. That's why I stuck with pretty
> much the original wording. I expected that this issue would
> come up today in our discussion.
>
> Since the WCAG wording is already in the harmoinization
> analysis table, I have added your second alternative to the
> proposal 2 page.
>
> ISO did not include this requirement that the information
> conveyed with color also be conveyed visually. Why didn't
> they feel that it was important?
>
> I wonder if this is too prescriptive. The user need is to be
> able to understand the information that is being conveyed by
> the color. This can be solved by a couple of strategies:
>
> - providing the information in a redundant visual way
> - providing a means for the user to customize the colors used
> to something he or she can distinguish. For example, the
> market map at SmartMoney.com [1] uses color to convey
> information. According to Whitney, the user can customize the
> colors used.
>
> So why do we feel the need to be so restrictive in 508 and WCAG?
>
> [1] http://tinyurl.com/2uekpr
>
> Andi
>
>
>
>
>
> Peter Korn
>
> <Peter.Korn@Sun.C
>
> OM>
> To
> Sent by: TEITAC Web/Software
> Subcommittee
> teitac-websoftwar
> < = EMAIL ADDRESS REMOVED =
> = EMAIL ADDRESS REMOVED = >
>
> itac.org
> cc
>
>
>
> Subject
> 08/14/2007 10:31 Re:
> [teitac-websoftware] Color
> AM
>
>
>
>
>
> Please respond to
>
> TEITAC
>
> Web/Software
>
> Subcommittee
>
> <teitac-websoftwa
>
> = EMAIL ADDRESS REMOVED =
>
> g>
>
>
>
>
>
>
>
>
>
> Hi Gregg,
>
> Good catch. My preference is the second of your two proposals.
>
>
> Regards,
>
> Peter Korn
> Accessibility Architect,
> Sun Microsystems, Inc.
>
> > Current TEITAC proposal is not sufficient.
> >
> > "Color must not be used as the only means of conveying information,
> > indicating an action, prompting a response, or
> distinguishing a visual
> > element."
> >
> > 1) Markup could be used to meet this requirement and is of
> no value to
> > people who are color blind - and they are the target of
> this provision.
> >
> > (The Non-text content provision and presentation provision already
> > cover this for people who are blind.)
> >
> > 2) For products where AT is not used or usable, a new provision or
> > subprovision would be needed.
> >
> > Suggest using WCAG language.
> >
> > *Any information that is conveyed by color differences is also
> > simultaneously visually evident without the color differences. *
> >
> > Or perhaps
> >
> > "*Color must not be used as the only VISUAL means of conveying
> > information, indicating an action, prompting a response, or
> > distinguishing a visual element."*
> >
> > * *
> >
> >
> > Gregg
> >
> > ------------------------
> >
> > Gregg C Vanderheiden Ph.D.
> > Professor - Depts of Ind. Engr. & BioMed Engr.
> > Director - Trace R & D Center
> > University of Wisconsin-Madison
> > _<http://trace.wisc.edu/>_ FAX 608/262-8848
> >
> > DSS Player at http://tinyurl.com/dho6b
> >
> > If Attachement is a mail.dat try http://www.kopf.com.br/winmail/
> >
> > <http://trace.wisc.edu:8080/mailman/listinfo/>__
> >
> >
> ----------------------------------------------------------------------
> > --
> >
> >
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