What defines complementary colors?

Complementary colors are defined as colors that are located directly across from each other on the color wheel. This positioning creates a strong contrast when they are used together, making each color appear more vibrant. For instance, the classic pairs of complementary colors include red and green, blue and orange, or yellow and purple. When placed next to one another, they enhance each other visually. This contrast is particularly useful in various art forms, as it can create focal points, depth, and dynamics in artwork.

The other options reflect different color relationships. Blending well together refers to analogous colors or harmonious color schemes, where colors adjacent to each other on the wheel are combined. Adjacent colors indeed create cohesion but do not provide the stark contrast that defines complementary colors. Lastly, combining colors into shades involves altering the hue with black or white, which does not pertain to the concept of complementary colors at all. Thus, understanding the unique positioning of complementary colors on the color wheel is fundamental in color theory and application in art.