What can complementary colors create when used together?

Complementary colors, which are located opposite each other on the color wheel, create a striking contrast when used together. This phenomenon arises because complementary colors enhance one another, making each color appear more vivid and dynamic. When placed side by side, they produce a visual tension and excitement that can grab viewers' attention. The contrast between these colors can also add depth and dimension to art, emphasizing different elements within a composition.

The other options do not capture the essence of what complementary colors achieve when paired. Harmony typically results from the use of analogous colors or those that are closely related in hue, rather than opposites on the color wheel. A dull effect might occur when complementary colors are mixed together, resulting in neutral tones rather than vibrant contrasts. A monochromatic look involves variations of a single color, which does not pertain to the concept of complementary colors at all.