Testing your Web applications for the color blind.

1 in 20 people have some form of color vision deficiency, and if you're not one of them, it's probably difficult to picture how much color plays a part in day-to-day life, and in business. Pie charts? Graphs? Inventory dashboards with red or green indicators? When developing Web applications, it's important to keep these things in mind.

This article also links to a cool Web link that shows you what your site looks like to someone who is color blind.