Watercolor hues like Lauren Conrad
's blue and Chloé Moretz
's pink can temporarily be achieved by rubbing soft pastel chalks onto your ends, but head to the salon for a longer-lasting option. "Trend colors can end up blotchy if you apply them yourself. Ask your stylist for a dip-dye effect, but be specific about the color you want to achieve," said Ronnie Dietrich, lead colorist at Ted Gibson Salon. "Use deeper colors if you have dark hair, and if you have light hair, opt for pastels."