Color Charm 6N-6/0Helps to refresh faded color and adds new richness or fashion tones to existing hair color. This long-lasting color is vibrant and ammonia-free and will leave hair silky soft and brilliantly bright. Ideal for covering first grays, toning highlights, creating lowlights, or glazing to add color shine. Excellent gray coverage that covers the most resistant grays. Gray blending on hair that is up to 50% gray.