Red, yellow, and blue, the mixture of which will yield all other colors in the spectrum but which themselves cannot be produced through a mixture of other colors.
The colors from which all other colors can be made. The primary colors of light are red, green, and blue. These are the additive primaries, used for transmissive or emissive color. The primary colors of pigments are cyan, magenta, and yellow, used for reflective color. It's possible to create all colors from primary colors because the human eye contains three different types of color-sensitive photoreceptors, which are sensitive to the individual primary colors.