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Re: Recommend efficient color contrast checker

for

From: Chagnon | PubCom
Date: Jun 18, 2013 1:42PM

If you're working with more highly-designed documents with graphics, color
text, and other objects, Adobe Illustrator and Photoshop have a quick
utility to view the colors for Protanopia and Deuteranopia.

Open or import the file in Illustrator (depending upon the file type: note
that PDFs can be open natively in Illustrator).
Select View, Proof Setup.
Choose either Protanopia or Deuteranopia
Then, Select View, Proof Setup again and then Check Colors.

This doesn't change the colors, but instead lets the designer view how they
will appear to people with color blindness.

-Bevi Chagnon
- - -
www.PubCom.com - Trainers, Consultants, Designers, Developers.
Print, Web, Acrobat, XML, eBooks, and U.S. Federal Section 508
Accessibility.
New Sec. 508 Workshop & EPUBs Tour in 2013 - www.Workshop.Pubcom.com

-----Original Message-----
From: <EMAIL REMOVED>
[mailto: <EMAIL REMOVED> ] On Behalf Of Jared Smith
Sent: Tuesday, June 18, 2013 1:36 PM
To: WebAIM Discussion List
Subject: Re: [WebAIM] Recommend efficient color contrast checker

Checking contrast for text in or on images is inherently difficult to do in
an automated process - it's difficult to identify the image colors
automatically, let alone know which of the image colors you want to test
(not to mention complexities like gradients, transparency, etc.). In
general, there will need to be some human component to this. There are,
however, some tools to make this process easier. I highly recommend
Colorzilla add-ons for Firefox or Chrome (http://www.colorzilla.com/). You
can easily activate the tool, click on a location within an image, and
Colorzilla will copy the RGB value of the point you have clicked to the
clipboard, so you can then paste it into tools like the WebAIM contrast
checker. I'm looking into adding a similar tool into WAVE so you can check
image contrast right within the evaluation tool.

Jared Smith
WebAIM.org
messages to <EMAIL REMOVED>