Close your eyes. Imagine leafy trees, delicate plants, juicy fruits, cloudy skies and the deep blue sea, all painted in shades of grey. For most mammals, the world is black and white. Seeing in technicolour is one of our privileges as humans. Perhaps that’s why colour matters to us, no matter where we come from. Colour is used to portray power, values and emotions around the world and throughout history: royals have used purple to reinforce their high status, red and blue are employed to portray political values, black is a symbol for sorrow in many cultures and yellow is used to display joy. Above all, colour affects the way we feel. Different colours can comfort, inspire and stimulate us.