This document discusses color theory and its use in films. It begins by defining color as a property of light and describes the three components of color: hue, saturation, and brightness. It then explains color theory, including the color wheel and primary/secondary/tertiary colors. The document outlines how different colors can be used to evoke emotions or set tones in films and provide cultural and symbolic meanings. Specific examples are given of how colors like red, blue, and green may be used and the emotions they can represent.