In color theory, what is the effect of using complementary colors?

• A. Complementary colors are adjacent on the color wheel.
• B. Complementary colors are opposite on the color wheel and create strong contrast.
• C. Complementary colors mix to produce grayscale.
• D. Complementary colors are those with identical hues.

Answer: (B)

Using colors that are opposite on the color wheel creates the strongest possible contrast and a sense of visual energy. These complementary hues sit across from each other, so they have very different wavelengths, which makes them stand out against one another when placed together. The result is a bold, dynamic look that immediately draws the viewer’s eye and separates the elements in a composition.

In practice, this pairing is why subjects stand out when highlighted with a complementary color; the surrounding color makes them appear more vivid. It’s also why complementary colors can feel tense or vibrant when used at similar levels of intensity. If you mix complementary pigments, you often get a neutral gray or brown, which is another reason they balance well when one color dominates and the other is used as an accent.

Common examples include blue with orange, red with green, and violet with yellow. If colors were adjacent on the wheel, you’d get a harmonious, less intense palette; if colors shared identical hues, they wouldn’t provide the strong contrast.