From Longman Dictionary of Contemporary Englishlowlightslow‧lights /ˈləʊlaɪts $ ˈloʊ-/ noun [plural] DCBa dark colour that can be used to change the natural colour of some of your hair → highlights
Examples from the Corpus
lowlights• Or go for lowlights in a rich autumn glow.• Hair is naturally composed of lots of different tints, so streaking, lowlights and selected colouring gives a more flattering effect.• Those were just two of the lowlights.• It was a mistake on my part to try to cover the grey with lowlights.• Kerry Hayden took care of Ruth's colour by partially covering the white with lowlights. 