Mary Kate Olsen Brown Hair Color

At the 2012 CFDA Awards, designer Mary-Kate Olsen showed off a dramatic new hue—a far cry from her normally blonde locks—courtesy of John Frieda International Creative Consultant Harry Josh.

How to get Mary Kate Olsen's brown hair color Want to replicate this shade at home? Josh recommends John Frieda's Precision Foam Colour in 4BG ($12.99 at drugstores). "It's difficult to recommend at-home hair color to replicate a professional color job at-home, but this formula truly delivers professional results. Plus, this dark, chocolate brown shade is incredibly gorgeous," says Josh. "It's fun to experiment with a new hair color and deep, rich brunette shades tend to leave hair looking healthy and shiny."