Wella Professionals Illumina Permanent Hair Color in the shade 9/03 is a professional hair dye product designed for salon-quality results. This 60 ml formulation delivers rich, long-lasting color with excellent gray coverage while preserving the hair's structure. The Illumina series features advanced color technology that provides vibrant, dimensional tones with naturally-looking results. Shade 9/03 offers a medium blonde base with subtle golden-beige undertones for a sophisticated, sun-kissed appearance. The ammonia-based formula ensures reliable color development and even coverage, while the integrated care system protects the hair during the coloring process. Suitable for salon professionals and experienced home users, this permanent hair color offers up to 100 percent gray coverage with dependable color retention. The creamy consistency allows for easy application and even distribution throughout the hair. Each package contains enough product for medium-length hair, with precise mixing ratios for optimal color development. The color retains its vibrancy for several weeks with proper hair care and fades gradually without unwanted yellow tones. Professional colorists recommend conducting a strand test before full application to check the desired result. Store in a cool, dry place away from direct sunlight to maintain product quality.