Thanks to Game of Thrones hair envy, Targaryen shades like sterling are trending. Jourdan Dunn achieved her Met Gala gunmetal with a wig, but a longer-lasting effect starts with lightened strands; if you’re not already blonde, opt for highlights or go all the way with double-process bleaching. “Don’t wash your hair a day before [the service],” says Garnier Canada hair expert Roger Medina. “Your scalp’s natural oils will act as a barrier to prevent irritation.” After hair is lifted, metallic toner adds the shimmering touch. These tints are semi-permanent, so they’ll fade with washing.