Espresso on the double. High speed, high gloss color in just 10 minutes! 100% long-lasting gray coverage. 10 min. High speed, high gloss permanent color that gives reflective shine and dimension in just 10 perfect minutes! The Perfect 10 haircolor experience-never before possible at home! Perfect 10 Shade Guide. Shade 4 is an espresso dark brown shade which gives a high gloss result that will add depth to the natural tones of your hair. For optimal results, use on light brown to black hair.