As kids we were taught the primary colors are red, yellow, and blue. Color printers use reflective color mixes, but the primary colors used for print are magenta, yellow, and cyan. When you mix equal amounts of 2 primary colors, the color you get is called the complementary color. Additive Color Computer monitors and TV's give off light rather than reflecting it. They use what is called emittive or additive colors.
Emittive colors have a different set of primary colors than reflective.
An interesting piece of trivia is that the emittive primary color pallet is the complimentary pallet for reflective colors and vice versa. With emittive colors you see the color that is shined at you rather than the leftover part that is reflected back. Playing with emittive colors. Go into the paint program on your computer. Go into the section that lets you edit colors.