Bebe Rexha's latest nail art — purple outlines — is an upgrade from the quintessential dark manicure trend that tends to come with Fall. It combines three nail trends that we foresee taking over this season: dark shades, pearly finishes, and outline designs (which model Rosie Huntington-Whiteley wore earlier this month). The best part: you can re-create the look with £3 nail polishes.