Well-- what is color theory? In brief, it's how one uses color to convey certain messages and what messages color often has associated with it.
The chapter starts off with a glance at the history of color theory and, in the grand scope, our never ending struggle to disband chaos and create order. The author starts us at Aristotle and progresses us forward (about 2,000 years. I guess the rest of the world had better things to do...) to Isaac Newton and the first color wheel (divined from the splitting of a light beam) and updates us more regularly with other artists, scientists and philosophers.
Back history: done and done.
The author then brings us into the various fields that color is used, shows different approaches to categorizing color (i.e. the Munsell color tree, the standard 12-step color wheel, the color triangle, etc.) and also shows off the various color schemes.
All in all, straight forward and to the point. The chapter offers many lovely and well saturated images, and it can get a little distracting when trying to read through it at first and on the left is a giant picture that screams "HEY, YEAH YOU, LOOK AT ME. I'M FULL OF RED" ... but I managed to ignore it.
What I really, REALLY liked about this chapter though was the color index that showed how colors can be applied, what they mean in certain situation and their pros / cons.
It hit me to be more aware of what colors to use with what audience. For instance western cultures tend to see white as serene and often associated with divinity and beauty whereas some eastern cultures (namely Japan) sometimes associate white with death.
One must be mindful of their audience and use the proper tools accordingly.