Colour Freedom Permanent Hair Colour. M4 Stone Grey.

Knight and Wilson Colour Freedom M4 Stone Grey is a permanent hair colour formulated to deliver full grey coverage with a salon-style, creamy texture. Ideal for those seeking cool-toned stone grey results, it works best on pre-lightened hair and suits clients aiming for long-lasting colour. The formula blends pigment depth and conditioning agents to minimise harshness while maintaining an even finish.