Robert Colquhoun (20 December 1914–20 September 1962) was a Scottish painter, printmaker and theatre set designer. Colquhoun's early works of agricultural labourers and workmen were strongly influenced by the colours and light of rural Ayrshire. His work developed into a more austere, Expressionist style, heavily influenced by Picasso, and concentrated on the theme of the isolated, agonised figure. From the mid-1940s to the early 1950s he was considered one of the leading artists of his generation. Along with that of MacBryde, the work of Colquhoun was regularly shown at the Lefevre Gallery in London.