The document discusses color science and human color perception. It explains that color depends on the wavelength of light and how the eye perceives different wavelengths. The eye contains three types of cones that are most sensitive to red, green, and blue light. Combinations of these primary colors can reproduce any color visible to humans. Common color models used in devices include RGB used in computer monitors, CMYK used in printing, and YUV/YCbCr used in video and television.