The Sassoon Intensitone Green Blue is a specialized color-correcting product designed to neutralize unwanted undertones in hair color. This formula works effectively to counteract brassiness or overly warm tones, helping to maintain a pure and desired shade, whether natural or colored. Ideal for professionals and home users seeking precision in their hair toning regimen, this corrector ensures vibrant, true-to-tone results between salon visits. Its concentrated nature allows for powerful, visible results with minimal product use.