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Re: Color Contrast List?

for

From: Bryan Garaventa
Date: Apr 29, 2013 12:12PM

I understand, but in my case, I have no sight. So an imperfect scanner at
least, gives me the ability to home in on possible areas where potential
problems may be found, instead of the default where I am, well, totally
blind to their existence...

An imperfect solution is better than no solution at all, and regarding color
contrast specifically, if I were to ask 100 sighted people to analyze the
same thing separately , I would not get 100% agreement in any case. Not for
anything other than black and white at any rate.



----- Original Message -----
From: "James Nurthen" < <EMAIL REMOVED> >
To: "WebAIM Discussion List" < <EMAIL REMOVED> >
Sent: Monday, April 29, 2013 10:42 AM
Subject: Re: [WebAIM] Color Contrast List?


> 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
>> >
>> >
>> >