This document discusses using color in game design. It covers: 1) Different ways color can be used according to Tufte - to label, measure, represent reality, and enliven. 2) Examples of how color is used in games for team identification, item highlighting, mood/tone, conveying information, and representing reality. 3) Tips on choosing colors including considering the color wheel, mood palettes, cultural implications, and color blindness. The document emphasizes using color sparingly and effectively in design.