Art of ColourA unique approach to the history of art told through the story of colour and pigments. Did you know that the ultramarine that shimmers at the centre of Vermeer's Milkmaid connects that masterpiece with 6th century Zoroastrian paintings found on the walls of cave temples in Bamiyan, Afghanistan? Or that the surging waves that crest and curl in Hokusai's perilous Great Wave off Kanagawa owe their absorbing blue lustre to an alchemist who was born in