L'OREAL Effasol Color Remover Effasol Color Remover leaves hair beautifully conditioned and ready for recoloring. Leaves hair beautifully conditioned and ready for recoloring, It removes color build-up and muddy-looking tints. Does not restore hair to natural color, it removes the tint. Leaves hair in lightened state and can be used with water or developer. Effasol Color remover creates a gentle foaming bath that washes away permanent haircolor.