Colour Scheme

Colour Scheme is a detective novel by Ngaio Marsh; it is the twelfth novel to feature Roderick Alleyn, and was first published in 1943. The novel takes place in New Zealand during World War II; the plot involves suspected Nazi activity at a hot springs resort on the coast of New Zealand's Northland region and a gruesome murder whose solution exposes the spies. Alleyn himself is working for military intelligence in their counterespionage division. Marsh's next novel Died in the Wool also concerns Alleyn's counterespionage work in New Zealand.

Colour Scheme was one of four Alleyn novels adapted for New Zealand television in 1977; Alleyn was played by George Baker.