What defines primary colors in the context of color theory?

In color theory, primary colors are defined as colors that cannot be created by mixing other colors together. Instead, they serve as the foundational building blocks from which a wide array of other colors can be derived by combining them in various ways. In the context of traditional color theory, the primary colors are red, blue, and yellow. These colors are essential because all other colors can be formed by mixing different proportions of these primary ones.

The other choices may touch on aspects of color but do not accurately capture the essence of primary colors in color theory. For example, while it is true that mixing primary colors can create secondary colors, this does not define what primary colors are, which are fundamentally colors in their purest form. Similarly, the mention of beauty products or vibrancy does not pertain to the definition of primary colors but rather to their application or characteristics in aesthetic contexts.