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Re: question regarding WAVE, color contrast and color difference

for

From: James Nurthen
Date: Oct 19, 2015 11:25AM

Birkir,
You can certainly do some guessing but there isn't a definitive way of
coding such a check as far as I'm aware. I try to avoid guessing in tools
as I find false negatives to be particularly worrying. In our internal tool
I account for this kind of thing when using certain technology stacks, but
I haven't attempted to write something that works with more publicly
available technology stacks.

ARIA tries to discourage this kind of text - there are a bunch of ways of
accomplishing the same thing as was done here without using "hidden" text
already using ARIA - so I'm not sure I see a need for ARIA to directly
support this kind of "hidden" text.
Regards,
James

On Sun, Oct 18, 2015 at 4:35 PM, Birkir R. Gunnarsson <
<EMAIL REMOVED> > wrote:

> I am curious about that last statement.
> There are a couple of classic case of hiding content for screen
> readers only, using off-screen CSS or the clip method are the two most
> popular ones.
> These classes have no standard names, but often have names such as
> visualyHidden or offScreen.
> So I would think that accessibility testing tools can make educated
> guesses about the intension based on these classes.
> That being said, I also see the complications.
> A text maybe visually hidden, or completely hidden, until user takes a
> certain action (such as activating a link or schecking a checkbox), at
> which point the content becomes visible.
> I wish we had an ARIA attribute, standard class name or something else
> to clearly signal the intention of visually hiding content but keeping
> it available to assistive technologies.
> ARIA already offers a lot of new functionality, such as invisible
> labeling (using aria-label).
>
> That being said, the less text we need specifically for one group of
> users, the better.
>
>
>
> On 10/17/15, Howard Kramer < <EMAIL REMOVED> > wrote:
> > Thanks James.
> >
> > -Howard
> >
> > On Sat, Oct 17, 2015 at 6:22 PM, James Nurthen < <EMAIL REMOVED> >
> wrote:
> >
> >> There is only 1 real contrast error on that page - the placeholder text
> in
> >> the search box does not meet the 4.5:1 ratio. Many contrast checkers
> miss
> >> this one.
> >>
> >> The other error that tools will find is the "Our Sponsors" text which is
> >> provided as a header for screen reader users and is not shown visually
> on
> >> the page. Many tools will still report this text as it is very difficult
> >> to
> >> determine automatically that it is not actually visible.
> >>
> >> Regards,
> >> James
> >>
> >> On Sat, Oct 17, 2015 at 12:01 PM, Howard Kramer < <EMAIL REMOVED> >
> wrote:
> >>
> >> > Hello All:
> >> >
> >> > This may be a question best answered by Jared or Jonathan but I
> welcome
> >> any
> >> > other input.
> >> >
> >> > I used the WAVE tool <http://wave.webaim.org/>; to check the Accessing
> >> > Higher Ground home page <http://accessinghigherground.org/>; and
> found 2
> >> > low
> >> > contrast flags under the "style" tab (or with styles active) but none
> >> under
> >> > the "contrast" tab. Does this mean that there's a setting in my css
> that
> >> > stipulates low contrast but it is not used on the page?
> >> >
> >> > Also, I ran the Juicy Studios Contrast Analyzer and found 1 color
> >> contrast
> >> > issue (this also seems to be a case of a css color setting that does
> not
> >> > actually appear on the page) but a number of color difference issues.
> >> > The
> >> > latter is not specified in WCAG 2.0 as far as I can tell. How
> concerned
> >> > should I be regarding color difference?
> >> >
> >> > Thanks,
> >> > Howard
> >> >
> >> >
> >> >
> >> > --
> >> > Howard Kramer
> >> > Conference Coordinator
> >> > Accessing Higher Ground
> >> > 303-492-8672
> >> > cell: 720-351-8668
> >> >
> >> > Join us for the *Accessing Higher Ground Conference
> >> > <http://accessinghigherground.org/>;* in Denver, Colorado, Nov 16-20,
> >> > 2015.
> >> > Complete Attendee, Exhibitor, Hotel, and Registration materials are
> >> > available now.
> >> >
> >> >
> >> >
> >> > Complete program information and registration is open for our full
> >> line-up
> >> > of webinars, *AHEADtoYOU!
> >> > <http://ahead.org/learn/virtual-learning/webinars>;* And the
> *Technology
> >> > Access Series <
> http://ahead.org/learn/virtual-learning/at_webinars_15_16
> >> > >*.
> >> > Site capacities for all webinar events is limited; please register at
> >> your
> >> > earliest convenience for the largest selection.
> >> >
> >> >
> >> >
> >> > Not yet a member of AHEAD? *We welcome you to join AHEAD now.
> >> > <http://ahead.org/join/become-a-member>;*
> >> > > >> > > >> > > >> > > >> >
> >> > >> > >> > >> > >>
> >
> >
> >
> > --
> > Howard Kramer
> > Conference Coordinator
> > Accessing Higher Ground
> > 303-492-8672
> > cell: 720-351-8668
> >
> > Join us for the *Accessing Higher Ground Conference
> > <http://accessinghigherground.org/>;* in Denver, Colorado, Nov 16-20,
> 2015.
> > Complete Attendee, Exhibitor, Hotel, and Registration materials are
> > available now.
> >
> >
> >
> > Complete program information and registration is open for our full
> line-up
> > of webinars, *AHEADtoYOU!
> > <http://ahead.org/learn/virtual-learning/webinars>;* And the *Technology
> > Access Series <http://ahead.org/learn/virtual-learning/at_webinars_15_16
> >*.
> > Site capacities for all webinar events is limited; please register at
> your
> > earliest convenience for the largest selection.
> >
> >
> >
> > Not yet a member of AHEAD? *We welcome you to join AHEAD now.
> > <http://ahead.org/join/become-a-member>;*
> > > > > > > > > >
>
>
> --
> Work hard. Have fun. Make history.
> > > > >