Impressionist artists used the effect of "Optical Mixing" to create the illusion of color. By using short, separate brushstrokes of pure tones directly onto the canvas, the colors visually blended together as the observers moved away from the painting. For example, when painting a body of water,
Claude Monet might have applied strokes of pure blue to represent the shadow areas and strokes of yellow to represent the light areas, which created the illusion of a green color, even though the painter had not actually added that particular hue to the canvas. In other words, each brushstroke has its own specific role in a painting, but also works for the whole image that is being created, through a careful choice of the elements present in the artist's palette.
