HORTICULTURE

Detailed explanation-1: -Direct harmony, also known as complimentary colors, means pairing your key color with the color sitting on the opposite side of the color wheel. Red and green, blue and yellow, and orange and green are the primary examples of direct harmony.

Detailed explanation-2: -Complementary colors are simply colors that are directly opposite each other on the color wheel. Rather than complimenting each other (as people often think), they cancel each other out; a mixture of them would produce a greyscale color. Classic examples include red and green, blue and orange, and yellow and purple.