Artist 
Writer Chiaroscuro
A style of painting developed by Leonardo da Vinci, where not only black and white were used to show objects in shadow and light as previously painted. With chiascuro, you also add color. For example, to show an orange object in the shadows the artists would add black and a touch of burnt sienna. To show a red object in the light, they would add white and vermilion red.
To learn more about this technique see the Form Building Block.