NUTRI COLOR filters 524 100 ml NUTRI COLOR filters #524 100 ml is a hair color product created by Wella Professionals. It is a permanent hair color that provides up to 100% gray coverage and intense color vibrancy. It is also formulated with a wheat germ oil and silk protein complex that helps to nourish and protect the hair while coloring. The product also contains an ammonia-free formula that helps to reduce the risk of scalp irritation.