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Re: Questions regarding color and readability

From: Gregg Vanderheiden <gregg@raisingthefloor.org>
Date: Thu, 25 Jun 2015 10:43:51 -0500
Cc: Dick <wayneedick@gmail.com>, IG - WAI Interest Group List list <w3c-wai-ig@w3.org>
Message-Id: <F446261C-D2FA-4A35-81D5-5FE985EE033B@raisingthefloor.org>
To: Duc Ta <duc.ta.740@my.csun.edu>
Let me introduce you to wayneedick@gmail.com <mailto:wayneedick@gmail.com>

He has looked at these issues a lot and can give you some good leads.

For allowable colors that you can use and still have needed contrast - see  
Black Text on Colors that just pass at several contrast ratios <http://trace.wisc.edu/contrast-ratio-examples/Sample_Text_BlackOnColors.htm>
White Text on Colors that just pass at several contrast ratios <http://trace.wisc.edu/contrast-ratio-examples/Sample_Text_WhiteOnColors.htm>
(these are from the color samples link in Understanding WCAG 2.0 ) 

there are many examples here that are much less contrast than black on white —  and still pass WCAG
(PS the top rows are the ones that pass - the other rows in a block are what they look like (approx.) to people with color vision differences. 

If you are looking for something tuned to one person - you can have even less contrast of course


Gregg Vanderheiden
gregg@raisingthefloor.org <mailto:gregg@raisingthefloor.org>

> On Jun 24, 2015, at 3:06 PM, Ta, Duc <duc.ta.740@my.csun.edu <mailto:duc.ta.740@my.csun.edu>> wrote:
> Hi 
> My name is Duc Ta. I'm just recently into the accessibility field around 3 years. We know that there is wcag 2.0 guideline regarding color contrast. However, I didn't have any luck in finding any guidelines that talking about color combinations, readability and migraines/eye constraints. For example, I heard from many people saying that they have a migraine or eye constraints when they spend their time reading white text on black background for few minutes. Hope to hear from you soon. Wish you have great week
> Best,
> Duc Ta
Received on Thursday, 25 June 2015 15:44:23 UTC

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