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
Operator logo Operator logo An operator logo is a logo which appears on the status screen of a mobile phone. Originally intended as a way for phone companies to brand phones attached to their networks, the operator logo has since become a method by which owners may customise their phones to reflect their own interests. It helped kick off mobile phone content advertising which became particularly prominent with ring tone adverts. Later phones have provided the facility to have animated screen savers, or colour logos. An industry has sprung up around the use of these logos, and around ring tones, tailored towards