L'Oréal Prodigy Hair Color in 21 Hair Oxi Black Sapphire offers a luxurious and permanent ammonia-free hair coloring experience. Infused with advanced technology, this hair color provides intense black sapphire tones while ensuring your hair's health and vibrancy. The key active ingredients include nourishing oils and color pigments that penetrate deeply into the hair shaft, delivering long-lasting color and shine. The innovative formula works by opening the hair cuticle to allow the color to penetrate deeply, resulting in a rich and vibrant black sapphire hue. This hair color not only transforms your look but also nourishes and protects your hair, leaving it soft, smooth, and radiant. The creamy texture makes application easy and comfortable, ensuring even coverage and stunning results every time.