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Subject:Re: Color and colorblindness From:Geoff Lane <geoff -at- gjctech -dot- co -dot- uk> To:TECHWR-L <techwr-l -at- lists -dot- techwr-l -dot- com> Date:Mon, 28 Sep 2009 16:35:33 +0100
On Monday, September 28, 2009, Nancy Allison wrote;
> I thought it would also be interesting to see if any of you
> incorporate color blindness into your online documentation design
> (or print doc, for that matter).
I have a red/green colour vision abnormality, so I incorporate
allowances for abnormal colour vision in everything I do. FWIW, I
refuse to call the condition "colour blindness" because very few
people are truly colour blind (i.e. have monochromatic vision).
> But online . . . just wondering if anyone else has gone down this
> route and what you decided.
Remember that one in eight of all males and a lesser number of females
have abnormal colour vision. This is a significant proportion of the
population, so it's a good idea IMO to take steps to improve
accessibility of your docs for those with such a condition. It's quite
easy to achieve this since the "golden rules" are:
* never use colour alone to impart information,
* never use red, green, or blue on black or vice versa, and
* avoid using similar tonal values next to each other.
WRT the last "rule", if it looks OK to you when converted to
greyscale, it should be OK.
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