THE LAST FASHION COLOR THEORY VIDEO YOU'LL EVER WATCH

I'm a painter so I am VERY familiar with the color wheel -- what you're describing is a split complementary/analogous palette. Complements are by no means the only way to build a cohesive palette; in fact they work best for adding a "pop" or unexpected element to the piece. Pure, saturated complements tend to make people's eyes hurt. Complements make each other look brighter, which isn't necessarily everyone's goal in making an outfit. Just like the goal of music isn't necessarily to be AS LOUD AS POSSIBLE AT EVERY MOMENT!!!