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. Perfect for guests who want to control unwanted warm tones and see natural results. 6 Ash blue performs best at levels 4 or 5 to create a dark blonde with a cool, smoky aura.