Colour Rules of Thumb is a simple yet effective guide to the non black, white and red world. [via 43 Folders]
The Color of Cool, a Business 2.0 article about why so many new products use blue LEDs. Pantone even declared Cerulean Blue (Pantone 15-4020 TC), the colour of the sky on a serene, crystal clear day, as the official colour of the millennium.
Vischeck's colour vision model allows you to simulate how the world looks to people with various sorts of colour deficiency. You can check a single image, or webpage, or just download it. Here's a temporary snapshot of MeFi after being vischecked.
Adopt a color let's you name a colour for $25. Would be great to have MeFi Blue, Zeldman Orange, Kottke Yellow as standard colour names. Would make a good last minute christmas gift for a friend who's got a site. [via Fairvue]