Study for Painting. Red, Yellow, Blue and Green

Bridget Riley (b. 1931) Study for Painting. Red, Yellow, Blue and Green signed, titled and dated 'Study for Painting Red, Yellow, Blue and Green Bridget Riley '83' (lower left) gouache and pencil on paper 34¾ x 25in. (88.2 x 63.6cm.) Executed in 1983