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Re: Color Contrast List?

for

From: James Nurthen
Date: Apr 29, 2013 11:42AM

Yet again I would just like to point out that all of these automated color
contrast tools produce many false positive and many false negatives. Unless
someone can show me otherwise all of these tools can produce misleading
results when any of the following techniques are used in the page:

- Background images under text
- CSS Gradients
- Any background CSS colours using rgba values (semi-transparent
backgrounds)

These techniques are becoming more and more common so these semi-automated
tools are becoming less and less useful over time. I wish there were a good
solution but I am not aware of one at the moment.

Regards,
James



On Mon, Apr 29, 2013 at 9:38 AM, Bryan Garaventa <
<EMAIL REMOVED> > wrote:

> That is excellent! Thank you, it works for authenticated sites as well :)
> I'll add this to my resource list.
>
>
>
> ----- Original Message -----
> From: "Bourne, Sarah (ITD)" < <EMAIL REMOVED> >
> To: "WebAIM Discussion List" < <EMAIL REMOVED> >
> Sent: Monday, April 29, 2013 6:36 AM
> Subject: Re: [WebAIM] Color Contrast List?
>
>
> > Bryan,
> >
> > Nancy's and Greg's suggestions should be very useful for Sam's original
> > question.
> >
> > For what you're looking for, the Colour Contrast Analyser tool on the
> > Juicy Studio Accessibility Toolbar for Firefox
> > (
> https://addons.mozilla.org/en-US/firefox/addon/juicy-studio-accessibility-too/
> )
> > may do the trick. The results are presented in a table that includes
> > elements and classes and parent nodes, as well as the color values and
> > pass/fail information.
> >
> > sb
> > Sarah E. Bourne
> > Director of Assistive Technology &
> > Mass.Gov Chief Technology Strategist
> > Information Technology Division
> > Commonwealth of Massachusetts
> > 1 Ashburton Pl. rm 1601 Boston MA 02108
> > 617-626-4502
> > <EMAIL REMOVED>
> > http://www.mass.gov/itd
> >
> >
> >