The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors. The RGB color space is a cube with these three colors forming the axes and all combinations of red, green, and blue light at each point inside the cube producing a different color. The RGB color model is based on how human vision perceives color using three types of color receptors in the eyes. It is used to represent color digitally for monitors, cameras, and other devices.