Oil Slick Is the Rainbow Hair Technique Brunettes Can Wear Everywhere you look this Summer, blondes have been sporting colorful hair shades — pastel pinks, vibrant blues, and even gray. But what about the la.s with mahogany manes?
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Introducing "oil slick hair," dubbed by Aura Friedman of Sally Hershberger Salon, a beautiful style that applies jewel tones over darker hair, giving it an iridescent appearance. This is similar to the opal hair color trend, but its shimmery effect comes from blending darker shades rather than ultra-pale ones.