Examining a breakthrough moment in Bridget Rileys career this volume illustrates the importance of colour to the artists investigation of visual contrast and perception. During the early 1960s Rileys blackandwhite work employed elementary shapes to convey movement and light. Having tested this limited set of means the artist incorporated colour into her paintings in 1967. This volume accompanies an exhibition at Graves Gallery Sheffield 18 February25 June 2016 that chronicles the period of ch