((free)) - Tetradic

It sounds scientific, but don't let the name scare you. A tetradic scheme is simply two pairs of complementary colors. Imagine a rectangle on the color wheel: Orange/Blue and Yellow/Purple. Four colors. Infinite possibilities.

If you use a pure, saturated Red (warm) next to a pure Green (cool), the line where they meet will actually hurt the eyes (vibrancy effect). tetradic

When used right, tetradic schemes look expensive, energetic, and masterful. When used wrong, they look like a clown exploded. It sounds scientific, but don't let the name scare you

Stop using two colors. Start playing with four. It sounds scientific

Enter the (or Double Complementary) color scheme.