"Coloured Greys (2)" exemplifies Bridget Riley's systematic exploration of color interaction and optical perception through her signature geometric abstraction. Created as a screenprint in multiple colors on wove paper, the work demonstrates Riley's rigorous methodology of arranging modulated tones to generate visual vibration and spatial ambiguity without relying on figurative or representational content. The full margins preserve the work's integrity as a finished print while emphasizing Riley's consideration of the entire compositional field, characteristic of her approach to Op Art in the 1960s and beyond.