ColorFlip

Using a simple premise to cater to an audience of color lovers, Rafaël Rosendaal has created ColorFlip.com. You literally flip from one color to another, and that's it... but it's surprisingly fun, a little addicting, and a nice way to inject some color therapy into a hectic workday. Similar fun can be had on the Colours site from CPH Creatives, which quotes Marc Chagall: "All colors are the friends of their neighbors and the lovers of their opposites." [via JS]