For years now, the primary way of representing and storing color on a computer display has been to define it as existing in three dimensions: Red, Green, and Blue. What if that's wrong? “While the appearance of a color on a screen can be described in three dimensions, the blending of color actually is happening in a six dimensional space,” How Fifty-Three, developers of the iPad painting app Paper, used a theory of paint optics from 1931 to develop a better color mixer.
Get palette ideas from sites like GenoPal, generate color schemes with tools like Unsafe Color Match, put a color in and spit a palette out with Color Blender, or sharpen your color theory skills with The Meaning of Colours. These are all from the 50 Best Color Sites for Designers.
Pie charts that represent the proportional amount of color in each country's national flag. Similar to this (previously), only not as pointed.
Digital Artform is a fascinating resource for those interested in 3D graphics, digital painting, and the like. How about turning 2D stills into 3D animations, the truth about motion blur and colour mixing, or outlines in action? Also, a recipe for making your own Viewmaster reels, and the politics of colour saturation.