Which color is not present in the primary color scheme?

In the context of color theory, primary colors are the foundational colors that cannot be created by mixing other colors together. The primary colors traditionally recognized are blue, yellow, and red. These colors serve as the starting point for creating other colors through mixing.

Green, on the other hand, is considered a secondary color, which is formed by mixing blue and yellow together. Since green is derived from the combination of primary colors rather than being a primary color itself, it is the correct answer to the question regarding which color is not present in the primary color scheme. Understanding this classification of colors is essential for various applications in art, design, and color mixing.