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Thread: testing for color contrast as a totally blind tester

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From: Reinhard Stebner
Date: Fri, Jan 04 2013 5:03PM
Subject: testing for color contrast as a totally blind tester
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Does anyone know of any tools that a totally blind person can use to test
for color contrast on web sites?

From: James Nurthen
Date: Fri, Jan 04 2013 9:03PM
Subject: Re: testing for color contrast as a totally blind tester
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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?
>
> > > >

From: Bryan Garaventa
Date: Sat, Jan 05 2013 1:00AM
Subject: Re: testing for color contrast as a totally blind tester
← Previous message | Next message →

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 ADDRESS REMOVED = >
To: < = EMAIL ADDRESS REMOVED = >; "WebAIM Discussion List"
< = EMAIL ADDRESS 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?
>>
>> >> >> >>
> > >

From: Birkir R. Gunnarsson
Date: Sat, Jan 05 2013 9:28AM
Subject: Re: testing for color contrast as a totally blind tester
← Previous message | Next message →

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 ADDRESS 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 ADDRESS REMOVED = >
> To: < = EMAIL ADDRESS REMOVED = >; "WebAIM Discussion List"
> < = EMAIL ADDRESS 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?
>>>
>>> >>> >>> >>>
>> >> >> >
> > > >

From: Reinhard Stebner
Date: Sat, Jan 05 2013 9:45AM
Subject: Re: testing for color contrast as a totally blind tester
← Previous message | Next message →

Thank you. This helps and I had forgotten about BX.

-----Original Message-----
From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Birkir R.
Gunnarsson
Sent: Saturday, January 05, 2013 11:29 AM
To: WebAIM Discussion List
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 ADDRESS 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 ADDRESS REMOVED = >
> To: < = EMAIL ADDRESS REMOVED = >; "WebAIM Discussion List"
> < = EMAIL ADDRESS 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?
>>>
>>> >>> >>> >>>
>> >> >> >
> > > >

From: Bryan Garaventa
Date: Sat, Jan 05 2013 11:59AM
Subject: Re: testing for color contrast as a totally blind tester
← Previous message | Next message →

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 ADDRESS REMOVED = >
To: "WebAIM Discussion List" < = EMAIL ADDRESS 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 ADDRESS 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 ADDRESS REMOVED = >
>> To: < = EMAIL ADDRESS REMOVED = >; "WebAIM Discussion List"
>> < = EMAIL ADDRESS 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?
>>>>
>>>> >>>> >>>> >>>>
>>> >>> >>> >>
>> >> >> >>
> > >

From: Birkir R. Gunnarsson
Date: Sat, Jan 05 2013 12:11PM
Subject: Re: testing for color contrast as a totally blind tester
← Previous message | Next message →

Bryan

Brilliant, where could I download/purchase such?
Cheers
-B

On 1/5/13, Bryan Garaventa < = EMAIL ADDRESS 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 ADDRESS REMOVED = >
> To: "WebAIM Discussion List" < = EMAIL ADDRESS 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 ADDRESS 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 ADDRESS REMOVED = >
>>> To: < = EMAIL ADDRESS REMOVED = >; "WebAIM Discussion List"
>>> < = EMAIL ADDRESS 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?
>>>>>
>>>>> >>>>> >>>>> >>>>>
>>>> >>>> >>>> >>>
>>> >>> >>> >>>
>> >> >> >
> > > >

From: Bryan Garaventa
Date: Sat, Jan 05 2013 2:11PM
Subject: Re: testing for color contrast as a totally blind tester
← Previous message | No next message

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


----- Original Message -----
From: "Birkir R. Gunnarsson" < = EMAIL ADDRESS REMOVED = >
To: "WebAIM Discussion List" < = EMAIL ADDRESS 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 ADDRESS 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 ADDRESS REMOVED = >
>> To: "WebAIM Discussion List" < = EMAIL ADDRESS 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 ADDRESS 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 ADDRESS REMOVED = >
>>>> To: < = EMAIL ADDRESS REMOVED = >; "WebAIM Discussion List"
>>>> < = EMAIL ADDRESS 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?
>>>>>>
>>>>>> >>>>>> >>>>>> >>>>>>
>>>>> >>>>> >>>>> >>>>
>>>> >>>> >>>> >>>>
>>> >>> >>> >>
>> >> >> >>
> > >