Jewel tones are the haute hues for fall, and emerald is among the palette's breakout star. The deep green is a sophisticated way to bring color into your look, and unlike lime and seafoam, it flatters a wide range of skin tones. Olivia Palermo recently hit a home run in an emerald blazer and yellow jeans at London Fashion Week, while Jennifer Hudson used the rich shade to break up an all-black ensemble. But the most of-the-moment way to wear these hues is from head to toe. Rachel McAdams and Allison Williams have proven emerald to be an elegant alternative to black for evening-wear, while Emma Stone showed off the color's trendy side in a monochromatic ensemble.