Joico Lumishine Youth Lock Hair Color restores youthfulness to your strands by providing superior gray coverage for all hair types! It's a permanent crème hair dye that comes in natural shades, including natural ash dark brown, natural dark blonde, natural blonde, and more! With so many color options available, there is a perfect shade for everyone! What it does: When used with a quality developer, this hair dye will give you a long-lasting, true-to-shade result. It penetrates the hair shaft to deposit pigment molecules within. With just one application, you can get up to 100% grey coverage.