Wella Color Charm Liquid Hair Color! It's a permanent hair dye that comes in a range of beautiful, wearable hues, from deep, sultry black to vibrant red. You'll find cool and warm tones to choose from. this liquid hair color will give you an even color result that lasts. You can expect up to 100 percent grey coverage with just one application. This liquid hair color has a delightful, floral fragrance that you'll love. It is also formulated with Liquifuse technology. It also boosts gray coverage so that multiple color processes won't be needed.