1) Color is relative and depends on the light and weather conditions, as demonstrated by Monet's paintings of Rouen Cathedral at different times of day. 2) An object's color is enhanced using a chromatic scale from light to dark values, bright to dull intensities, and warm to cool hues to simulate the effect of light. 3) Artists like O'Keefe and Cezanne use a chromatic scale in their still life paintings to dramatically depict apples lit by a glowing light through variations in tone, brightness, and temperature across the subject.