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 BBC back to the very first logo in the 1950s and 1960s, which was not what the corporation wanted at that time. Technically, the logo never looked comfortable next to the brand and straight letters. Finally, it was expensive to print as stationery would always have four-colour letterheads, and alongside other BBC brands could mean anything up to ten-colour letterheads and stationery. Lambie-Nairn's solution is the BBC logo that has been used on-screen since 4 October 1997. By straightening up the boxes and letters, it removed all the problems associated with diagonals and those associated with disappearing lines. This kept