Hi Jeff I checked out the Aveda Blue Malva Shampoo that you said you use once a week to control your brassy color but it says it is for controling GREY from turning yellow but there was one call Black Malva Shampoo for Dark to medium brassy control, was that the one you meant? It sounds like that shampoo really cleans well because the testimonials say that it left the hair really clean but i would think that it would strip the color if it cleans so well> Could you possible post a link to where to get this Product you are taalking about Thank you