Thread Subject: Re: Contrast

From: Gregg Vanderheiden
Date: Tue, Aug 14 2007 11:15 AM

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Ah I see it now.
Hmmmm
You should put a note under contrast that says "for software - see user
prefernces provision for contrast " or some such. Hard to locate there
otherwise.

Thanks Andi.

Covers my concern.


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 11:59 AM
> To: TEITAC Web/Software Subcommittee
> Subject: Re: [teitac-websoftware] Contrast
>
> Gregg,
>
> We are requiring that software support the user preference
> settings in the platform. If the platform doesn't have user
> settings, then we require exactly what is required in Web.
>
> <user preference provison>
>
> Applications must provide a mode that utilizes platform
> settings for color, contrast, font type, font size, and focus
> cursor. In the absence of platform settings for color and
> contrast, all text (and images of text) must have a contrast
> ratio of at least 5:1 except for unavailable items or pure
> decoration. Large scale text (or images of large scale text)
> must allow a contrast ratio of at least 3:1.
>
> <end of user preference provision>
>
> You can't require software to have a default contrast if
> there are user preference settings in the platform that they
> also are required to support.
> That would result in conflicting requirements.
>
> Andi
>
>
>
>
>
> Gregg
>
> Vanderheiden
>
> < = EMAIL ADDRESS REMOVED =
> To
> u> "'TEITAC Web/Software
>
> Sent by: Subcommittee'"
>
> teitac-websoftwar
> < = EMAIL ADDRESS REMOVED =
> = EMAIL ADDRESS REMOVED = >
>
> itac.org
> cc
>
>
>
> Subject
> 08/14/2007 11:51 Re:
> [teitac-websoftware] Contrast
> AM
>
>
>
>
>
> Please respond to
>
> TEITAC
>
> Web/Software
>
> Subcommittee
>
> <teitac-websoftwa
>
> = EMAIL ADDRESS REMOVED =
>
> g>
>
>
>
>
>
>
>
>
>
> Thanks
>
> The software issue still remains however. The provision you
> cite only
> covers software where it permits color and contrast
> adjustment. If the
> software doesn't provide an adjustment -- then there are no
> contrast provisions at all that apply.
>
> Are we REQUIRING that software provide these adjustements
> somewhere and I just missed them?
>
>
> 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 11:35 AM
> > To: TEITAC Web/Software Subcommittee
> > Subject: Re: [teitac-websoftware] Contrast
> >
> > Gregg,
> >
> > Sorry. I thought I picked "color schemes" terminology up
> from ISO but
> > must not have been awake yet. Changed it. [1]
> >
> > Contrast ratio definition has not changed. [2]
> >
> > For software we have the User Preferences provision [3] and
> the Color
> > adjustment provision [4].
> >
> > [1]
> > http://teitac.org/wiki/Web_and_Software:_Reorganized_Web_and_S
> > oftware_provisions_2#Contrast
> > [2] http://teitac.org/wiki/EWG:Draft_July_18#Contrast_Ratio
> > [3]
> > http://teitac.org/wiki/Web_and_Software:_Reorganized_Web_and_S
> > oftware_provisions_2#User_Preferences
> > [4]
> > http://teitac.org/wiki/Web_and_Software:_Reorganized_Web_and_S
> > oftware_provisions_2#Color_adjustment
> >
> > Andi
> >
> >
> >
> >
> >
> > Gregg
> >
> > Vanderheiden
> >
> > < = EMAIL ADDRESS REMOVED =
> > To
> > u> "'TEITAC Web/Software
> >
> > Sent by: Subcommittee'"
> >
> > teitac-websoftwar
> > < = EMAIL ADDRESS REMOVED =
> > = EMAIL ADDRESS REMOVED = >
> >
> > itac.org
> > cc
> >
> >
> >
> > Subject
> > 08/14/2007 10:43 [teitac-websoftware]
> > Contrast
> > AM
> >
> >
> >
> >
> >
> > Please respond to
> >
> > TEITAC
> >
> > Web/Software
> >
> > Subcommittee
> >
> > <teitac-websoftwa
> >
> > = EMAIL ADDRESS REMOVED =
> >
> > g>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Hi
> >
> > I'm confused by the new language.
> >
> > Proposed new text is very hard to understand. When I read
> > it I think:
> > - What is a color scheme?
> > - If my color scheme meets this but I have
> > individual words
> > that are exceptions to the overall scheme - do those
> words have
> > to
> > meet?
> > - What is the definition of contrast? (same as old
> > definition I assume but - not clear since not cited)
> > - Why does large scale text have to meet a
> > contrast ratio
> > but only schemes for small text? (what is a scheme again?)
> >
> > Proposed language
> > Color schemes for text (and images of text) specified in
> Web content,
> > documents, or documents combined with presentation
> instructions (such
> > as style sheets), must have a contrast ratio of at least
> 5:1, except
> > if the text is pure decoration.
> > Large-scale text or images of large-scale text must allow a
> contrast
> > ratio of at least 3:1.
> >
> > SUGGESTION:
> > 1) eliminate the "color schemes" part of it.
> > 2) Change "such as style sheets" to "such as
> > style sheets
> > or commands" since "style sheets" makes it very specific and
> > unclear
> > if other means of specifying color would be covered.
> > 3) Add "software" to the list of things covered.
> >
> > NOTE: We need to add another provision to cover software if we use
> > this language - since it only covers content.
> >
> >
> >
> >
> > 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/
> >
> >
> >
> >
> >

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