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 by a C in the centre. This mosaic logo is still visible on the floor today, though the area no longer serves as the BBC's main reception room. The first incarnation of the BBC blocks logo appeared in 1958. It consisted of square boxes with slanted letters, not unlike the first slanted logo seen in the 1960s. In 1953, Abram Games was commissioned to design an on-air image. Nicknamed the 'bat's wings', it consisted of a rounded brass contraption with a tiny spinning globe in its centre, with large wing-like protrusions flanked by lightning bolts on either side. For BBC