Thread Subject: Re: Contrast

From: Gregg Vanderheiden
Date: Tue, Aug 14 2007 12:55 PM

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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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