The complete title of Sowerby’s work describes his main concern: «A New Elucidation of Colours, Original Prismatic and Material: Showing Their Concordance in the Three Primitives, Yellow, Red and Blue: and the Means of Producing, Measuring and Mixing Them: with some Observations on the Accuracy of Sir Isaac Newton.» Sowerby’s
Date: Sowerby introduced his colour-system in 1809 as a tribute to the “great Sir Isaac Newton”.
Country of origin: England
Basic colours: Red, yellow und blue
Form: Modified triangle
Bibliography: J. Sowerby, «A New Elucidation of Colours, Original, Prismatic, and Material: Showing their Concordance in Three Primitives, Yellow, Red, and Blue: and the Means of Producing, Measuring, and Mixing Them: with Some Observations on the Accuracy of Sir Isaac Newton», London 1809. «Color Documents: A presentational Theory», organised by S. Wurmfield, Hunter College Art Gallery, New York 1985; John Gage, «Colour and Culture, Practice and Meaning from Antiquity to Abstraction», Thames and Hudson, 1993, p. 221 (mention and comment).