For those of you doing web development, you might want to try running your pages through the “Colorblind Web Page Filter”. Simply enter the URL of your webpage, and it will download all of the assets and process them through the colorblindness filter of your choice. The screenshot above is VizWorld processed through the “Protan” filter, (Protanopia, where red appears dark). It’s a bit slow, but a great simple way to check your graphics for colorblind-related issues.
Randall Hand
Randall Hand is a computer graphics programmer and news junky that's been working in the field for the last 15 years. He's responsible for visualizations generated on some of the most powerful supercomputers in the world, ytnef, mullion support in ParaView, and VizWorld.com.