The website is glossary of art and design.

The Color Primer: A Basic Treatise on the Color System of Wilhelm Ostwald. (Hardcover) by Wilhelm Ostwald (Author), Faber Birren (Editor), 1969.

The Color Helm was a cardboard volvelle wheelchart made in 1940 by Fiatelle Inc that you could use to pick specific color combinations. A fashion-specific version was sold by Sears and advertised in their 1940 Fall/Winter catalog. Image source: https://cstaecker.fairfield.edu/~cstaecker/machines/colorhelm.html

The Munsell color system is a means to visually identify and match color. Since color is applicable in so many fields, learning how to read these color charts and numbers can be very useful. Here is a step-by-step.

In 1810, the last year of his young life, painter Philipp Otto Runge devised his Color Sphere, one of the first attempts to depict a comprehensive color system in three dimensions. Runge was a correspondent of Goethe, who was also interested in color theory. The image above is from Runge's book, Farbenkugel. It comes from…

Discover the legacy of Friedrich Wilhelm Ostwald's colour system, preserved in the Winsor & Newton archives. Learn how this Nobel-winning chemist's theories influenced artists and movements like De Stijl and Bauhaus, and how Winsor & Newton helped disseminate his revolutionary ideas on colour harmony.

Friedrich Wilhelm Ostwald (1853 – 1932). Illustration: Cluster of similarly dark-toned colours, 'Die Farbenfibel' (The colour primer). Leipzig, Germany: Unesma; 1921. Accessible at https://digital.sciencehistory.org/works/3f462642b