Robert Ridgway

The systematic order of colours starts with a circle comprising 36 pure, solid colours which, from the perceptional point of view, are given approximately equal spacing. From the base circle (equator), a double cone is constructed to accommodate the monochrome colours from white to black along its axis. (Detailed text)

Date: The American Robert Ridgway proposed a colour-system for identifying the colours of flowers, birds and insects in 1912.

Country of origin: USA

Basic colours: 36 pure solid (full) colours with intermediate distances perceived as approximately equal

Form: Double cone

Application: Scientific description of colours

Related systems: none

Bibliography: R. Ridgway, «Color Standards and Color Nomenclature», Baltimore 1912; G. Wyszecki, Farbsysteme, Göttingen 1960.