Used extensively as a dye in the food industry, it imparts a vibrant blue color to various edible products, enhancing their visual appeal. In the medical field, it serves as a vital staining agent during diagnostic procedures, particularly in lymph node mapping to identify sentinel lymph nodes in cancer surgeries. Additionally, it finds application in cosmetics, where it is incorporated into products like lipsticks and eyeshadows to achieve desired shades. Its role in histology is also notable, aiding in tissue staining for microscopic examination.