Re: contrast for images of text

I hope that in WCAG 2.1 or 3.0 or whatever the contrast issue will be of 
level A. I imagine someone with contrast problems (for example, myself) 
being completely unable to access the information due to images of text 
with a contrast of 1.5:1 or so. Since 1.4.3 and 1.4.5 are both of AA, it 
seems that a problem that can create a complete lack of access would be 
only of Level-AA. Someone with low vision can have a severe contrast 
deficiency and be even unable to know that there is information in the 
images.

Kind regards,
Ramón.

CAE-Vanderhe wrote:

>   Correct -   If the only distinguishing characteristic is color (HUE) 
>  then it would fail.
> 
> However, please note the LIGHTNESS  is not the  same a hue.      So if 
> the links are in a color that is VISIBLY MUCH LIGHTER or DARKER than the 
> surrounding text then it is possible that the links can be distinguished 
> without color — and it would pass.  
> 
> For example
> 
> The word link in this sentence is visible whether you can see color or not. 
> 
> The word  link  in this sentence is visible whether you can see color or 
> not.   
> Of course it is not as visible as with color - but the SC does not 
> prevent it.  In fact I think there might be a technique talking about 
> this — or that discusses this. 
> 
> Ah here it is
> 
> 
>       G183: Using a contrast ratio of 3:1 with surrounding text and
>       providing additional visual cues on focus for links or controls
>       where color alone is used to identify them
> 
> 
> 
> 
> 
> 
> 
> 
> On Apr 28, 2014, at 7:56 AM, Adam Solomon <adam.solomon2@gmail.com 
> <mailto:adam.solomon2@gmail.com>> wrote:
> 
>> Thanks for the response, Andrew.
>> What if you didn't have the proper contrast and also didn't have any 
>> other cue then this would fail 1.4.1, right?
>> Example: a paragraph of text where two words in the paragraph are a 
>> link, like:
>> "This is the time for all good men" (where the words good men are 
>> actually a link, and there is no color contrast with the surrounding text)
>> And what if the link had the same color as the surrounding text - that 
>> might not fail because all users are at an equal disadvantage (since 
>> there is absolutely no cue that this is a link)?
>>
>>
>> On Mon, Apr 28, 2014 at 3:26 PM, Andrew Kirkpatrick 
>> <akirkpat@adobe.com <mailto:akirkpat@adobe.com>> wrote:
>>
>>     Adam,
>>
>>     Color contrast is a AA issue, so it doesn’t matter if the text is
>>     in an image or is regular text, the contrast is a AA issue.
>>
>>      
>>
>>     1.4.1 speaks to conveying information with color, such as “click
>>     on the green button” but you can still meet 1.4.1 with poor
>>     contrast because by not relying on color alone you’d need to
>>     include other information. For example, “click on the green button
>>     that says ‘go’!”.  It is possible to have text that is very low
>>     contrast on that button, and that is ok for 1.4.1, but would fail
>>     1.4.3.
>>
>>      
>>
>>     AWK
>>
>>      
>>
>>     *From:* Adam Solomon [mailto:adam.solomon2@gmail.com
>>     <mailto:adam.solomon2@gmail.com>]
>>     *Sent:* Monday, April 28, 2014 12:25 AM
>>     *To:* WCAG
>>     *Subject:* contrast for images of text
>>
>>      
>>
>>     Would images containing text which don't have the proper contrast
>>     ratio fail at single A? I only see 1.4.3 (which is AA) mentioning
>>     the issue of contrast. I would have thought that images of text
>>     should fail at single A since the user agent has no way of
>>     overriding the css background and foreground color for these
>>     images?1.4.1 mentions the use of color to convey information and
>>     would seem a likely candidate to fail such an image, yet no
>>     mention is made there regarding images of text.
>>
>>     Thank you for any feedback
>>
>>
>

Received on Tuesday, 29 April 2014 10:48:18 UTC