Checking your designs for the color blind

Vischeck is a site that shows you what things look like to someone who is color blind.

You can try Vischeck online, run Vischeck on your own image files, or run Vischeck on a web page.

Simulates:
Deuteranope (a form of red/green color deficit)
Protanope (another form of red/green color deficit)
Tritanope (a blue/yellow deficit- very rare)

[via Hugh]