ANDREW BROOKES, NATIONAL PHYSICAL LABORATORY / SCIENCE PHOTO LIBRARY ANDREW BROOKES, NATIONAL PHYSICAL LABORATORY / SCIENCE PHOTO LIBRARY
Spectrum model. Plastic model showing how all colours are made up of just red, green and blue, which are known as the primary colours. The primary colours can be mixed to form the secondary colours: yellow (red and green, centre), magenta (red and blue, lower right) and cyan (blue and green, upper centre). Together, the primary and secondary colours form white (upper right). By mixing the primary colours in varying amounts, all possible colours can be made.
Model release not required. Property release not required.