Sir Isaac Newton discovered that when light goes through a(n) prism it reflects a band of rainbow colors. He named this color band a(n) spectrum. White sunlight is a mixture of many colors. The prism refracts each color at a different angle. Water drops break up rays of sunlight into different colors. When this occurs, a(n) rainbow forms in the sky. We can create these colors ourselves by mixing primary pigments. These include yellow, magenta, and cyan.