I like this particular chart of the emotional, physical, and behavioral effects of different colors, but the whole post is one of the best explanations of color I've seen. Explanations here for primary, secondary, and tertiary colors, as well as complementary, analogous, triadic, and warm/cool colors.
Have you ever thought of what the colour of your clothing might say about you? Colours always have an influence on the way we think and look at things, even though most of the time it is done sub-consciously. source