What are the three primary colors of colored light?

Three optical primary colors (RGB): red, green and blue (indigo).

When these three lights are mixed in the same proportion and reach a certain intensity, they appear white (white light); If the intensity of all three lights is zero, it is black (dark). This is addition principle, which is widely used in TV sets, monitors and other products that emit light actively.

For example, safflower absorbs yellow, cyan, green, blue, purple and other colors in white light, but reflects red light, so it looks red, so people see the color of the object, which is a different color that is not absorbed or absorbed less by the object. When different light colors reflect an object, they will show different colors, and objects that are colorless in the sun will also become colored objects.

Extended data:

Pigment tricolor

Yellow, magenta and cyan are the three primary colors in color printing, the principle and production of color photos, the design and practical application of color printers. Color printed matter is printed with yellow, magenta, cyan ink and black ink, and the printing in four-color printing is a typical example.

In the imaging of color photos, the three emulsion layers are yellow at the bottom, magenta in the middle and cyan at the top. All brands of color inkjet printers also print color pictures with yellow, magenta, cyan and black ink cartridges. By definition, primary colors should be able to modulate most other colors, and none of them can modulate primary colors.

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