Color, Contrast, & Dimension in Design
The Poynter Institute (a journalism school) offers up a useful interactive study on the physiology and psychology of color, and how they apply to design considerations in the news media.
Weblogs are themselves a kind of news medium, so this might be of particular interest to bloggers pondering a redesign of their sites. It definitely gave me something to think about, and inspired me to take a different direction than what I was originally considering.
