Brown
Primary, Secondary
Brown is the colour of soil, wood and bark, and is strongly tied to the natural world. In surveys in Europe and the United States it came out as the least popular colour. Researchers have suggested it reads as competence in advertising, because it is linked with reliability and support. Source
- UPS. Its trucks and uniforms are Pullman Brown, picked because brown is easy to keep clean and because of the luxury of Pullman rail cars. It calls itself "Brown" in its advertising. Source