Four colour harmony of contrasting colour scheme-
• Complementary harmony - Uses two hues that lie directly opposite to one another on the Colour Wheel.
• Double complementary - Has two pairs of complements, usually neighbours on the Colour Wheel.
• Split complementary - Has three color combination- a hue, its complement (directly across on the Colour Wheel) and neighbor. It may also use a hue and two neighbors of its complement.
• Analogous complementary - A combination of analogous and complementary schemes, a complement selected for dominance in a group of neighbouring colours.
• Triadic Harmony - A combination of three hues that lie equidistant from one another on the Colour Wheel.
