Paul Mitchell The Color Permanent Cream Hair Color 6Ab Dark Ash Blue Blonde Paul Mitchell The Color makes you feel cool and confident with this new Ash blue shade that softly controls warmth of dominant pigments as hair is lifted. This must-have hue creates rich espresso brunettes, bittersweet cocoa tones, or dark smoky blondes. 6 Ash blue performs best at levels 4 or 5 to create a dark blonde with a cool, smoky aura. It is perfect for guests who want to control unwanted warm tones and see natural results.