Get a demi-permanent silver glaze or gloss at your favorite hair salon. Glazes are ammonia-free and are packed with conditioning agents and lots of shine. When the color glaze is the same shade as your hair, it won’t change your base color at all. A silver gloss will deposit beautiful metallic tones to emphasize what you already have and remove any undesirable yellow tones. The glaze will fade out gently and since there is no maintenance involved, you can do this at your own pace.