Palettes of Famous Painters Some artists follow Whistler, who believed the management of the palette to be the basis of good painting; others stick to Isaac Newton’s theory of colour. Some artists mix every gradation of colour they will need for a painting before they start, others as they need them. “My freshly arranged palette, brilliant with contrasting colors, is enough to fire my enthusiasm,” noted Delacroix in his Journal in 1850. The French artist was meticulous in his arrangement of colours, and when unwell, would take his palette to bed and spend the entire day just mixing new shades.