Color theory explores how colors interact and are perceived, providing a framework for effective use in art and design. It covers color mixing, harmonies, and psychological effects, enabling artists to create visually appealing works that evoke specific moods and messages. The science of color perception involves light, the eye, and the brain. Primary colors (red, blue, yellow) can't be created by mixing others, while secondary and tertiary colors result from combinations. Color harmonies, like complementary and analogous schemes, create pleasing arrangements in compositions.