Colour
Colour is a late nineteenth-century scientific primer by the chemist Arthur Herbert Church, published in London by Cassell, Petter, and Galpin in 1870 and aimed at general readers and students. Its pictures are diagrams of colour theory: overlapping circles of red, green and blue-violet with mixed overlaps, and grids of coloured dots shown against white, grey and black grounds. A designer could take from them a clear method for studying how neighbouring colours shift each other and how a ground changes perceived hue.
