OT: Colorblindess (was Re: [TriLUG] Mandrake/Redhat usability.)

[Robert martin]

There is a free plugin for photoshop which will show an image as a
colorblind person would see it. The homepage is http://www.vischeck.com/

They also give some info and links to info about colorblindness. Another

interesting website is http://newmanservices.com/colorblind/default.asp
where you can paste html and it will show you how the page will look to
a
color blind person. The numbers I have seen are around 10% of the male
population and 0.5-1% of females (it is a recessive gene on the X
chromosome).
glenn
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im not sure if it is a "rule" but i have always thought that you need to
design colors in different thirds of the range to correct for
colorblindness (ie black text gray highlight white background or
completely backwards) anybody seen this kind of thing written down
somewhere??