The Ref Stockholm Ref Permanent Colour Green Corrector is a professional-grade product designed to precisely neutralize unwanted warm tones in hair during a coloring or lightening process. This corrector offers enhanced control over the final hair shade, ensuring optimal color results and consistency. Ideal for salon use or for those seeking sophisticated at-home color management, this formula integrates seamlessly with permanent color systems to deliver predictable and vibrant outcomes, maintaining hair integrity.