L'Oréal Paris Prodigy Permanent Oil Hair Color in shade 1 Obsidian offers a luxurious at-home hair coloring experience. This ammonia-free formula provides vibrant, long-lasting color while nourishing and protecting your hair. Enriched with oils, it leaves your hair feeling soft, smooth, and looking radiant. The key active ingredients include nourishing oils that penetrate deep into the hair shaft, providing intense hydration and color retention. The mechanism of action involves the oil-infused formula evenly distributing color for a seamless finish. This hair color not only beautifies but also cares for your hair, making it a must-have for those seeking a professional salon-quality result at home.