William Perehudoff (b. 1918) was a Canadian Colour Field painter from Langham, Saskatchewan. His early work was informed by the Emma Lake Artist’s Workshops he attended with Kenneth Noland and Clement Greenberg in the early 1960s. Greenberg was an influential art critic who advocated for “formalist” painting, which explored colours, forms, textures, and compositional space rather than representation. Perehudoff's long horizontal canvases, brightly saturated colours, and neutral “fields” were informed by American abstraction as well as his Prairie setting.

In the 1980s Perehudoff developed a method of bleeding paints across unprimed canvas to create soft, tonal washes. His 1980s paintings feature gestural strokes of bright gel acrylic. By the 1990s he returned to the geometric flatness of his 1960s works. The hard-edge blue, ochre, and peach forms in AC-91-011 float against the ivory field like musical notes.

Perehudoff's works are held in the public collections of the National Gallery of Canada, the Art Gallery of Ontario, the Montréal Museum of Fine Arts, the Art Gallery of Nova Scotia, the Glenbow-Alberta Institute, and the Canada Council Art Bank, among others. Private and corporate collections include the Bank of Montreal, RBC, Scotiabank, the Four Seasons, and the collection of HM Queen Elizabeth.