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 models filmed by black-and-white cameras. Colour was added afterwards, electronically, rendering it simple to change the colour as needed. In 1967, BBC2 introduced a logo featuring a blue 2 with a dot in the curve of the 2 and the word COLOUR underneath. In 1979, BBC2 debuted the first-ever computer-generated logo, a 2 flanked by a double line on the side. The symbols appeared on a black background, then disappeared. This logo remained in use until 1992. In 1988, the BBC produced yet another new logo. Since the last one was made, a consumer brand was becoming part of nearly