On a color wheel, which colors are considered complementary?

Complementary colors are pairs of colors that, when combined, cancel each other out by producing a grayscale color (white or black) and, when placed next to each other, create a strong contrast and enhance each other's vibrancy.

In the context of the color wheel, complementary colors are located directly opposite each other. Red and green are opposite colors on the color wheel, making them complementary. When used together in design, they can produce a striking visual effect due to their high contrast.

Though other pairs like blue and orange, or yellow and purple, are also considered complementary, the choice of red and green specifically exemplifies the principle of complementary colors accurately within the color wheel framework.