The Laws of Harmonious Colouring, Adapted to Interior Decorations, Manufactures, and Other Useful Purposes

The Laws Of Harmonious Colouring, Adapted To Interior Decorations, Manufactures, And Other Useful Purposes by David Ramsay Hay. The work presents a practical theory of colour harmony, arguing that colour arrangements follow fixed natural laws rather than mere taste. It traces the idea from ancient Egyptian and Roman practices through to modern science, endorsing a three-primary colour model (yellow, red, blue) and showing how secondary and tertiary colours arise and relate as melodies and concords. The text explains how tint, shade, and neutral hues influence balance, contrast, and luminosity, and how the interaction of light and pigment governs harmony in decoration, textiles, and manufactures. It offers concrete guidance for house-painters, designers, and manufacturers, including rules for tone selection, brightness control, and coordinating furniture, walls, carpets, and upholstery. Discussing artificial lighting and mediatory colours, it emphasizes avoiding crude schemes and urges applying nature’s examples to design and production. It concludes with broader reflections on art, education, and national industry.