Charles Hayter, A New Practical Treatise on the Three Primitive Colours, 1830.
18th century instrument to determine the sky’s ‘blueness’ called a Cyanometer:
The simple device was invented in 1789 by Swiss physicist Horace-Bénédict de Saussure and German naturalist Alexander von Humboldt who used the circular array of 53 shaded sections in experiments above the skies over Geneva, Chamonix and Mont Blanc.
via This is Colossal
M. E. Chevreul
The Principles of Harmony and Contrast of Colours
Modern color magic: in dress and home decoration (1936)
Charles Lacouture, Le Vert-Bleu, Chromatic directory. Solution reasoned and practical to the most common problems in the study and use of colors, 1890. Gauthier-Villars, France.
alfiusdebux: A New Practical Treatise on the Three Primitive Colours, London England, 1830.
Recipe book for decorated paper, late 19th century. Germany. Koninklijke Bibliothek