The answer is "Red, blue and green."
The primary colors of light are the colors that can be combined to create all other colors. In contrast to the primary colors of paint or pigment (which are red, yellow, and blue), the primary colors of light are red, blue, and green.
When these three primary colors of light are combined in different ways, they can produce a wide range of colors. For example, when red and green light are combined, they produce yellow. When all three primary colors are combined at equal intensity, they produce white light.
The primary colors of light are important in a variety of fields, including photography, television, and computer screens, where they are used to create and display color images.