I learned in a college art class a long time ago to arrange your colors in an "earth to sky" setting, for example your darkest colors, like blacks and browns at the bottom, work your way up to yellows, light blue, white at the top. Greens, reds, orange, pink, purples in the middle. Makes your eye gently flow up without a harsh demarcation. Ever notice how a vase is usually shaped narrow at the bottom, wider at the top--kinda like vapor dissipates as it rises. This is how I try to set my colors when I'm overwhelmed, and it's always worked for me. Maybe this will help you.