Tip No. 11: Whether you've colored your hair at home before or not -- read the directions carefully. "If the box says run the color through the ends for five minutes, don't do it for longer. Your ends could wind up two shades darker than your roots because they are more porous," Pemoulié says. And we all know the trend is the opposite -- dark roots with light ends. As Whitney Port of "The City" proves here.
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