Colorblindness references

I took an action item to send some pointers to resources on colorblindness.

Some of the resources below do in fact indicate what kind of combinations
can often cause problems, and I think it would be appropriate for us to
include those in techniques. I do not think we should *recommend* color
schemes, especially in a checkpoint.

Dick Brown, Microsoft


Can Color-Blind Users See Your Site?
<http://msdn.microsoft.com/voices/hess10092000.asp>
http://msdn.microsoft.com/voices/hess10092000.asp
<http://msdn.microsoft.com/voices/hess10092000.asp> 
Columnist Robert Hess continues his series on color use. This time, he
examines how color choices can affect site accessibility. (October 9, 2000)

A site to simulate rendering for people with color vision problems:
http://www.vischeck.com/vischeckURL.php3
<http://www.vischeck.com/vischeckURL.php3> 

http://www.lighthouse.org/color_contrast.htm
<http://www.lighthouse.org/color_contrast.htm> .


From the Microsoft Windows Guidelines for Accessible Software Design at
http://www.microsoft.com/enable/dev/guidelines/software.htm
<http://www.microsoft.com/enable/dev/guidelines/software.htm> :

Avoid Problematic Color Combinations 
Summary: Avoid using colors that commonly cause problems for people with
color vision anomalies.	

There are a number of things that can be done to allow even individuals with
color vision anomalies to be able to take advantage of the color-coded
information: 
-- Avoid using common pairs of colors that are indistinguishable by people
with color perception anomalies. For example, avoid mixing green and blue,
or red and green, red and brown, or white and light green.
-- Use colors that differ significantly in hues and intensity
-- Avoid muted colors with low luminance values (intensity).


		 -----Original Message-----
		From: 	Donovan Hipke  
		Sent:	Tuesday, November 28, 2000 3:23 PM
		To:	Gayna Williams
		Cc:	MSN Home Page Request; Dick Brown
		Subject:	MSN Color Schemes

		Hi Gayna.

		Seeing as how the home page supports color schemes, I
thought it would be a good idea to explore high contrast ones that would
liven things up for color blind users.  Do you have any data on what color
combos/hues work well for this?

		Thanks!

		Donovan Hipke
		MSN.com Dev Team
		Pager: 1854874@skytel.com
		 <mailto:1854874@skytel.com>