Final answer:
The three colors used in an additive primary system like color television are red, green, and blue.
Step-by-step explanation:
The three colors used in an additive primary system like color television are red, green, and blue. These colors are known as primary colors because they cannot be created by mixing other colors together. Instead, they are used to create all the other colors in the visible spectrum. For example, when red and blue are mixed together, they create purple.