W3C home > Mailing lists > Public > w3c-wai-ig@w3.org > July to September 2017

Re: Color Contrast (Minimum) Level AA requirement for "Photography" image

From: Patrick H. Lauke <redux@splintered.co.uk>
Date: Thu, 28 Sep 2017 16:38:02 +0100
To: w3c-wai-ig@w3.org
Message-ID: <d00eaf0a-4402-020a-4565-7901ca5c48a6@splintered.co.uk>
On 28/09/2017 16:17, Subramanian, Poornima (PCL) wrote:
> Great, here's my question -
> In our application, there are brochure images which are actually the 
> "photography of cover page" in JPEG format. Though they are photography 
> images, it has large amount of text in it which does not meet minimum 
> color contrast ratio.
> Attached image is a sample brochure.
> I find the below NOTE for the WCAG Reference: 1.4.3 Contrast (Minimum): 
> The visual presentation of text and images of text has a contrast ratio 
> of at least 4.5:1
> “Note: Images of text do not scale as well as text because they tend to 
> pixelate. It is also harder to change foreground and background contrast 
> and color combinations for images of text, which is necessary for some 
> users. Therefore, we suggest using text wherever possible, and when not, 
> consider supplying an image of higher resolution.”
> Can you please look and advise if the "color contrast” on this image is 
> required to make this image compliant? Or increasing the resolution of 
> image alone will be sufficient?
> Your suggestions, please?

I'm assuming here that the title of the brochures is also presented 
somewhere nearby as real HTML text. If so, arguably those images serve 
more of a decorative purpose (to give users a flavour/idea of what the 
brochure looks like), rather than acting to convey text for the user to 
read. As such, I personally would deem these acceptable as they are.

P
-- 
Patrick H. Lauke

www.splintered.co.uk | https://github.com/patrickhlauke
http://flickr.com/photos/redux/ | http://redux.deviantart.com
twitter: @patrick_h_lauke | skype: patrick_h_lauke
Received on Thursday, 28 September 2017 15:38:24 UTC

This archive was generated by hypermail 2.3.1 : Thursday, 28 September 2017 15:38:25 UTC