I’m one of those people who don’t see numbers in most of the color-blindness crop circles. Have never minded, nor known what I’m missing (though I have at times felt bored by the available spectrum and daydreamed that some genius will come up with a new primary color one of these days). Vischeck helps normally-sighted people visualize how the world looks to color-blind people — a process that proved fascinating to Amy just now.
But the really cool thing at Vischeck is their web page processor, constructed to help web designers see how their sites will look to color blind users. Running the test in deuteranopia mode, pages look identical to me before and after.
I had been on the job two years before I learned that most people see the J-School‘s homepage as greenish — I had always thought of it as beige or tan. The designer who preceded me should have used Vischeck :)
Note: Planned downtime at the jschool today as we undertake a Tiger Server upgrade.