Final answer:
The primary colors of light are red, green, and blue, used in the additive color system to mix and create a range of colors including white light.
Step-by-step explanation:
The primary colors of light are red, green, and blue. These colors are used in the additive color system, which applies to light sources such as computer screens and theater lighting. When these colors are combined in different ways, they can create any color in the visible spectrum, including secondary colors like cyan, magenta, and yellow. The phenomenon of light color mixing is based on the perception of light by the eye, as opposed to subtractive color mixing which involves pigments absorbing certain wavelengths of light. So, when red, green, and blue light are mixed together in equal proportions, they produce white light.