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
Logo of the BBC printed media and corporation correspondence, it used the BBC coat of arms, while on screen, it used a different logo type. Originally, it used a stylised BBC text on early equipment, not unlike the caption that accompanied the BBC1 COW globe. This logo was rarely seen on screen, with captions containing the words "BBC Television Service" along with matching clock. In 1932, when the original reception room of the BBC Broadcasting House in London opened, a logo was laid in mosaic on the floor. This logo was merely a stylized entwining of two capital B's, one facing either direction, linked