Intermediate colors are created when you mix.

Two primary colors together

Intermediate colors are created when you mix one primary color and one secondary color together.

To create intermediate colors, you need to mix two primary colors together. Primary colors are the most basic colors that cannot be created by mixing other colors. The three primary colors are red, blue, and yellow. By combining them in different proportions, you can create a variety of intermediate colors.

For example, mixing red and blue together will create purple, which is an intermediate color. Similarly, mixing yellow and blue will create green, and mixing red and yellow will create orange. These intermediate colors are achieved by blending primary colors in different combinations.

So, the correct answer would be: two primary colors together.