Exhibition: Who Needs Colour . . . : original paintings, drawings and prints by Picasso, Matisse, Chagall, Hockney, Riley, Haring, Hirst and Banksy for sale

Whilst the hues are limited, the scope of materials and techniques used is broad: from sandstone to steel and pencil to prints. The pared-back palette of the works displayed offer simplicity and starkness: from gogottes, which date millions of years old, to works produced in the 21^st-century. The absence of colour brings a more contemplative and thoughtful response through line, shading, texture and tones. Without the distraction of colour, the viewer is able to absorb the subtle shades and interplay of shadow and light. It is not just the stark shades of black and white, but the spectrum of shades in between: milky hues, greys, creamy whites and deep charcoal, that create intrigue. The elimination of colour often gives a more confronting urgency to many of the artworks, which can be at once mysterious and truthful, direct and raw.