In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Additive color is in contrast to subtractive color, in which colors are created by subtracting (absorbing) parts of the spectrum of light present in ordinary white light, by means of colored pigments or dyes, such as those in paints, inks, and the three dye layers in typical color photographs on film.
what do you call any two colors of light that combine to form white light