Let one of the hair color industry's rock stars reveal your true colors. Michael Casey is known among celebrities, socialites and beauty editors for his outstanding ability in creating the perfect customized hair color. His celebrity roster includes Penelope Cruz, Gwyneth Paltrow, Diana Krall, Viggo Mortenson, Michael Douglas and Bernadette Peters.Having honed his skills for over 25 years, Casey has won "New York Magazine"'s coveted "best colorist" award and was cited by "Allure" magazine as "master of the Park Avenue blonde." He's sure to color you beautiful. Hair Color by Celebrity Colorist Michael Casey at the Sally Hershberger Salon   (425 W. 14th St.)