Using User Settings/Windows high contrast mode (was Re: LVTF agenda items)

Hi Erich,

On 10/19/16, Erich Manser <emanser@us.ibm.com> wrote:
> Wondering if Using User Settings should stipulate that web content be
> readable/visible in Windows high contrast mode (or ZoomText/MAGic) - or is
> this too technology specific?
> Issues such as:
>    background images that get turned off in high contrast mode can cause
>    problems with text being visible or having enough contrast.
>    iconography that doesn't show up well in high contrast mode because it
>    might either be too small or may also have poor contrast against the
>    background when transparency is used.
>    Copy/paste features when high contrast mode is on (either copy paste is
>    copying and pasting the high contrast color schemes and you don't want
>    them to because the user you're sending the information to isn't using
>    that mode, or when copying/pasting between applications and some
>    applications paste in high contrast mode and some don't.
>    Outlines of custom entry fields that disappear because a background
>    image was used to provide the box.
>    Checkbox and radio button states that don't appear to be visually
>    apparent because of customization that doesn't work well in HCM, isn't
>    in the HCM color scheme the user had chosen

Great list. Windows high contrast mode is a problem, alright. How to
write an SC for it in a technology agonist way is the hard part.

Something to be aware of is that WCAG has historically had F3: Failure
of Success Criterion 1.1.1 due to using CSS to include images that
convey important information [1]. However, F3 is under discussion to
remove the HCM requirement [1]  so it would NOT be a failure. Check
the pull request [2]. A yet to be written technique for HCM has been
proposed but not written.

Kindest Regards,
Laura

[1] https://www.w3.org/TR/WCAG20-TECHS/F3.html
[2] https://github.com/w3c/wcag/issues/80
[3] https://github.com/w3c/wcag/pull/120/files?diff=split

-- 
Laura L. Carlson

Received on Wednesday, 19 October 2016 13:33:31 UTC