If you are interested in web design and wonder how you can design a web site taking into account that one out of twelve persons is colorblind, you have to read this well researched article.
Rachel starts with a short and comprehensive overview on color blindness and heads afterwards into some details about how to design web sites for colorblind users. On top of that she ends with a large link list pointing to other sources on the topic and tools for web site designers. — Well done.
Update: It looks like the site went inactive just this weekend! I only realised after writing this article, that the weblog wasn’t updated for quite a long time. At the moment the article is still available through Google cache here.