Georges Seurat once revealed that he had been ‘interested in finding an optical formula’ for painting since he was just 17 years old. Seurat spent most of his adult life thinking about colour, studying theories, and working out systematically how one colour, placed in a series of dots, next to those of another, creates a whole different colour when it hits the retina of the human eye. How one colour can make another appear luminous bright, and vibrant.