A 1913 paper by Professor Roberts Beaumont on the theory of colour in woven textiles. It argues that colour effect depends on technical factors as well as hue: fibre quality, yarn construction, fibre blending, fabric structure, weave (intertexture) and finishing. It outlines six groups of colour theories, then examines fibre qualities and fabric structure in more detail. Examples are a silk fabric with several weave sections and worsted/silk twill and weft-cord fabrics, illustrated with micro-photographs and a sectional weave diagram. It closes with brief notes on mathematical colour-and-weave effects and colour standardisation.