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Re: testing for color contrast as a totally blind tester

for

From: Bryan Garaventa
Date: Jan 5, 2013 2:11PM

No need to purchase, BX can be downloaded from
http://dlee.org


----- Original Message -----
From: "Birkir R. Gunnarsson" < <EMAIL REMOVED> >
To: "WebAIM Discussion List" < <EMAIL REMOVED> >
Sent: Saturday, January 05, 2013 11:11 AM
Subject: Re: [WebAIM] testing for color contrast as a totally blind tester


> Bryan
>
> Brilliant, where could I download/purchase such?
> Cheers
> -B
>
> On 1/5/13, Bryan Garaventa < <EMAIL REMOVED> > wrote:
>> BX is a JAWS script developed by Doug Lee, which allows for DOM tree
>> traversal, MSAA traversal, and quite a few other things, geared for blind
>> developers to examine runtime objects.
>>
>> I use this every day for both testing and development.
>>
>>
>> ----- Original Message -----
>> From: "Birkir R. Gunnarsson" < <EMAIL REMOVED> >
>> To: "WebAIM Discussion List" < <EMAIL REMOVED> >
>> Sent: Saturday, January 05, 2013 8:28 AM
>> Subject: Re: [WebAIM] testing for color contrast as a totally blind
>> tester
>>
>>
>>> Hi Bryan and all.
>>>
>>> I grudgingly admit my ignorance and have to ask "what is BX"?
>>> Thanks
>>> -B
>>>
>>> On 1/5/13, Bryan Garaventa < <EMAIL REMOVED> > wrote:
>>>> 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?
>>>>>>
>>>>>> >>>>>> >>>>>> >>>>>>
>>>>> >>>>> >>>>> >>>>
>>>> >>>> >>>> >>>>
>>> >>> >>> >>
>> >> >> >>
> > >