Colors influence how you feel – energized, calm, cheery, relaxed, intense, even depressed

Not just hue, but saturation, tint and brightness. Hue – pure color, tint is original color + white (lighter than original color), shade is original color + black (darker than original color), saturation defines a range from pure color to gray

Just as no two people are alike, different people will perceive the same color differently. Can be related to memories or specific feelings associated with a certain color.