Dark Balayage | Cool and earthy, this shade is surprisingly refreshing for spring and summer. When sunny and warm summer days are finally on the horizon, most Southern ladies are ready to freshen up their look with a new cut or color in anticipation. While your first instinct might be to match the weather with warm tones like gold, honey, caramel, and chestnut, we argue that the best approach to the changing season is the new cool-toned hair color trend taking over: mushroom brown hair.