Complementary colors live on opposite sides of the color wheel. Imagine red and green, blue and orange, or yellow and purple. Or move a half step over on the wheel, and combine a yellow-green color ...
Split complementary colors are the perfect mix of contrast and harmony, offering a dynamic twist on the classic complementary color scheme.
On the color wheel, analogous colors are neighbors, sitting right next to each other. Think of red and orange, yellow and green, or blue and purple.