By Patricia Reynoso
Whether your golden locks are natural or you work hard at maintaining that most famous of hair colors, you've likely considered giving different blond intensities a whirl. But before you decide to go lighter or darker, remember the top rule of hair color change: The farther you stray from your current color, the more damaged your hair will be. Overall, pros advise remaining within two levels (the scale by which hair color is measured) in either direction. "When you go too far, the hair texture that you feel today will be gone tomorrow," warns Gretchen Monahan, Dove Hair Care celebrity stylist and owner of Grettacole Salon, in Boston.