Lowlights are the exact opposites of highlights. They are darker pieces of hair usually reserved for the layers underneath and around the neck. "If kids are out in the sun, the top of their heads get really light and the middle, back, and under are always darker because that part doesn’t see the sun."
Lowlights might also be in order if your highlights have morphed into one solid color over time. "I call it the buildup of highlights," Kari explained. "If you go every 6-10 weeks, and get highlights over and over, eventually you will probably need some lowlights to break it up because things just get solid."