The book explores the art and science of chromaticism, featuring masterpieces from the Centre Pompidou Collection. Every summer, the Grimaldi Forum Monaco produces a major thematic exhibition designed to express the renewal of creativity. Collaborating with the world's leading cultural institutions, its projects are internationally renowned. This year's "Colours!" exhibition, which relies on the Centre Pompidou's collections, was designed from a surprising observation: as obvious as such a subject may seem, there are very few works devoted to the modern artistic use of colour. Through an original itinerary evoking the chromatic disks that fascinated artists in the late 19th and early 20th centuries, "Colours!" also explores, through immersive rooms, the notion of synesthesia, that mysterious dialogue between sound, smell and visual perception. About one hundred masterpieces - from the early 20th century to the present day - punctuate this journey, raising the question of the "decorative", inherent in the pictorial use of colour.