Warm colors are vivid and energetic.
Cool colors are calm and soothing.
Use complementary colors for emphasis. They naturally play off one another and make each other look more vivid and intense.
Use analogous colors when you want more than one color but want to maintain a sense of unity.
Primary colors can’t be mixed or made. Combinations of primary colors create all other traditional colors.
Combining two primary colors together creates a secondary color.
Combining a primary and a secondary color results in a tertiary color. You may know them by their fancier names like “teal” or “lime green” but they are referred to by the two colors that make them up, with the primary color first.