A matrix color refers to the rich variety of professional hair color shades offered by brands like Matrix Professional India, such as SoColor and WonderColor, which provide a range of permanent and demi-permanent options for lightening, darkening, toning, and covering grey hair. These hair color lines feature a diverse palette from vibrant reds and rich browns to natural blondes and sophisticated cool tones, utilizing technologies like Kera-Protect to ensure vibrant, long-lasting, and healthy-looking results.