Which color is not a primary color?

In color theory, primary colors are defined as colors that cannot be created by mixing other colors together. The primary colors in the additive color model, which pertains to light, are red, blue, and green. However, in the subtractive color model often used in pigments and printing, the primary colors are typically red, blue, and yellow.

In this context, green is considered a secondary color because it is created by mixing blue and yellow. Since primary colors are the building blocks for creating other colors, identifying green as not being a primary color demonstrates an understanding of how colors interact within different color models. Therefore, recognizing that green results from the combination of other colors solidifies its classification as a secondary color rather than a primary one.