London. Paris. New York. Thick foam for deep colour saturation. Lock in rich salon-quality colour. Permanent colour. 100% grey coverage. Non-drip. No patches. Traditional Colour: Unwanted patches. Our Foam Colour: Flawless colour. Experience Fade-Resistant, Salon-Quality Colour: Our thick, rich foam penetrates strands for deep colour saturation that locks in rich colour, giving you fade-resistant, salon-quality results. This non-drip formula spreads quickly and easily into roots and hard-to-reach places giving you complete coverage without patchiness. The result-natural-looking, salon-quality colour. Our nourishing after-colour conditioner seals in colour for long-lasting, tonal richness. Shade Guide: 4N is a neutral dark brown shade designed to enhance your natural undertones. For optimal results, use on light brown to black hair. On mostly grey hair, colour will appear lighter than colour shown on result swatch. On red hair, your colour results will be dark reddish brown.