What do complementary colors do when placed next to each other on the color wheel?

Complementary colors, which are located opposite each other on the color wheel, create a striking visual contrast when placed next to one another. This contrast is a fundamental concept in color theory, as the pairing of these colors accentuates their differences, making each one appear more vibrant and intense.

For example, when a warm color like red is placed next to its complementary cool color green, the vibrancy of both colors is enhanced due to the stark contrast. This effect is widely used in art and design to create visual interest and draw attention.

While complementary colors can blend together if mixed, their intended effect in design is to provide contrast, which is what makes B the correct choice. Other options like blending together or canceling each other out do not accurately represent the relationship complementary colors have when viewed side by side. Additionally, while complementary colors can enhance each other, the term "contrast" more accurately describes their interaction in this context, emphasizing the visual dynamics at play.