You might wanna use Vischeck when designing (accessible) websites. It shows you how your website will look to the color blind.
Accessibility
Vischeck- an accessibility tool that shows you how a colorblind person sees your webpage
May 27, 2005
New Working Draft of the Web Content Accessibility Guidelines 2.0 (WCAG) is out
November 12, 2004
Since the previous public Working Draft of WCAG 2.0, published on 30 July 2004, the WCAG working group has incorporated over 200 public comments. To help address usability issues raised with the July drafts, WAI also developed “Introduction to Web Content Accessibility Guidelines (WCAG) 2.0 Working Draft Documents” as a starting point for WCAG 2.0. The Introduction illustrates the relationships between WCAG 2.0 and the supporting documents, and links to the current version of each document. The introduction is available at: http://www.w3.org/WAI/intro/wcag20
The WCAG has had 5 working documents published since Nov 19th this year.
You can send in your comments on the draft by 3 January 2005 to: public-comments-wcag20[at]w3.org