What color does blue add to turn red?

Red is one of the three primary colors and cannot be synthesized.

The light will be brighter and brighter. Paired mixing can get brighter intermediate colors: red, medium green and ultramarine (purple blue), and three equal mixing can get white.

Three primary colors refer to the three basic colors that cannot be decomposed. What we usually call three primary colors, namely magenta, yellow and cyan (cyan is not blue, and blue is a mixture of magenta and cyan). The three primary colors can be mixed into various colors and add up to white at the same time. Black, white and gray belong to colorless system.

Extended data:

The three primary colors we use in photography, that is, the RGB colors set on our cameras and computer monitors, are the three primary colors of color light, which is an addition model. The three primary colors of red, green and blue are added in different proportions to produce light of various colors.

Look at the explanation of the term RGB: red, green and blue, and the first letters of three English words are RGB. The three primary colors corresponding to the three primary colors of color and light are the three primary colors of pigment, which is a subtractive model. These three primary colors are cyan, magenta and yellow. Pigments of three colors can be mixed to get other colors.

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