Color triangle Color triangle A colour triangle is an arrangement of colours within a triangle, based on the additive combination of three primary colors at its corners. An additive colour space defined by three primary colors has a chromaticity gamut that is a color triangle, when the amounts of the primaries are constrained to be nonnegative. Before the theory of additive color was proposed by Thomas Young and further developed by James Clerk Maxwell and Hermann von Helmholtz, triangles were also used to organize colors, for example around a system of red, yellow, and blue primary colors. After the development of the
The Colour of Magic The Colour of Magic The Colour of Magic is a 1983 comic fantasy novel by Terry Pratchett, and is the first book of the "Discworld" series. The first printing of the British edition consisted of 506 copies. Pratchett has described it as "an attempt to do for the classical fantasy universe what "Blazing Saddles" did for Westerns." The story takes place on the Discworld, a planet-sized flat disc carried through space on the backs of four huge elephants – Berilia, Tubul, Great T'Phon and Jerakeen – who themselves stand on the shell of Great A'Tuin, a gigantic sea turtle. The