Tertiary colors are created by mixing a primary color with a secondary color. The primary colors are red, blue, and yellow, while the secondary colors are green, orange, and purple. This combination results in six distinct tertiary colors: red-orange, yellow-orange, yellow-green, blue-green, blue-purple, and red-purple. These colors are often used in art and design to create depth and interest. Tertiary colors can enhance color palettes and provide more options for artists and designers when creating visually appealing compositions. Understanding tertiary colors is essential for effective color mixing and application.