Around the web
"The most interesting thing about colour contrast is that you really can’t detect it with the naked eye, even if you (think) you have perfect colour perception vision.
Yes, it’s easy to see that the white on yellow above should get someone fired, however there are lots of combinations that aren’t as easy to test with the naked eye alone. You could easily assume (never assume) that the palette you are working with is accessible because you can see it.
Newsflash: you are not the user."