What colors of light are combined in a television to produce thousands of different colors?

The colors of light that are combined in a television to produce thousands of different colors would be as follows: Red, Green, and Blue.

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The additive reproduction process mixes various amounts of red, green and bluelight to produce other colors. Combining one of these additive primary colors with another produces the additive secondary colors cyan, magenta, yellow. Combining all three primary colors produces white.