David Briggs' The Dimensions of Colour, a comprehensive online explanation of traditional (what you've probably been taught) and modern colour theory, and its applications to visual art. Invaluable for artists and non-artists alike. (The answer: probably some kind of brown. Yes, your kindergarten teachers fed you lies.)
"I believe that before anything art should bring happiness to the viewer." ~ Adib Fattal, Syrian Painter who infuses his work with bright colours (Titanic), optimistic scenes of places he remembers as a child (Jenin, Palestine), and wild life (Return of the Birds). More of his work here. [via]
In the year 2525 if man is still alive, future generations will be able to consult this book or type a request into their DIY UNIT™ and reproduce the effect of wood or marble.
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.