WebAIM - Web Accessibility In Mind

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Re: testing for color contrast as a totally blind tester

for

From: Bryan Garaventa
Date: Jan 5, 2013 1:00AM

It is possible for someone who is totally blind to check color contrast up
to a point.

If using BX, you can use the HTML map to navigate to a DOM node, press
ctrl+shift+s twice to show a list of all browser styles applied to the
element, including background-color and color property values, which can
then be compared using the checker at
https://www.ssbbartgroup.com/reference/index.php/Color_Contrast_Checker

James is right, it's necessary for sighted assistance to evaluate background
images and graphic coloration though.


----- Original Message -----
From: "James Nurthen" < <EMAIL REMOVED> >
To: < <EMAIL REMOVED> >; "WebAIM Discussion List"
< <EMAIL REMOVED> >
Sent: Friday, January 04, 2013 8:03 PM
Subject: Re: [WebAIM] testing for color contrast as a totally blind tester


> It is not possible for someone who is totally blind to check for colour
> contrast. While automated tools can determine the contrast of simple text
> on a simple background, there are too many places where automated tools
> cannot reliably determine the colour contrast.
> Some examples of these are when using background images, background
> gradients and background colours using alpha (transparency).
> Regards,
> James.
>
>
> On Friday, January 4, 2013, Reinhard Stebner wrote:
>
>> Does anyone know of any tools that a totally blind person can use to test
>> for color contrast on web sites?
>>
>> >> >> >>
> > >