the temperature of a black body (Planckian) radiator whose perceived colour most closely resembles that of a given stimulus at the same brightness and under specified viewing conditionsthe temperature of the Planckian radiator whose perceived colour most closely resembles that of a given stimulus at the same brightness and under specified viewing conditions unit: K NOTE 1 - The recommended method of calculating the correlated colour temperature of a stimulus is to determine on a chromaticity diagram the temperature corresponding ...