What does tertiary mean in the art sense?

In the art sense, "tertiary" refers to colors that are created by mixing a primary color with a secondary color. For example, mixing yellow (a primary color) with green (a secondary color) produces yellow-green, which is a tertiary color. Tertiary colors often provide a broader palette for artists, allowing for more nuanced and complex color schemes in their work. They play a crucial role in color theory and can enhance depth and interest in visual compositions.