A complementary color scheme is made up of colors that are opposite each other on the color wheel. The primary complementary color schemes are red with green, blue with orange and yellow with... A complementary color scheme is made up of colors that are opposite each other on the color wheel.
If the base color was green, for instance, the split-complementary colors would be red-orange and red-violet, rather than the direct complement of red. Alternatively, if the base color was red, then the split-complements would be blue-green and yellow-green, not green.
Just like analogous, a triadic color scheme is easier to understand than it may sound. Instead of grouping three or more colors that neighbor each on the color wheel, you'll be taking three colors that are equally spaced and decorating your space with these beautiful, contrasting shades.