cobalt blue


noun

a deep blue to a strong greenish-blue color.
any of a number of pigments containing an oxide of cobalt.
Also called king's blue, Thenard's blue.

Origin of cobalt blue

First recorded in 1825–35

Example sentences from the Web for cobalt blue

British Dictionary definitions for cobalt blue

cobalt blue

noun

Also called: Thénard's blue any greenish-blue pigment containing cobalt aluminate, usually made by heating cobaltous sulphate, aluminium oxide, and phosphoric acid together
  1. a deep blue to greenish-blue colour
  2. (as adjective)a cobalt-blue car