Use this product as a hair glaze after using a permanent color. My hair is a medium brunette. I get the 8B (Sheer blonde blue), use a 10 developer, leave it in my hair for 10 minutes and it is a great hair glaze. It does not turn it blonde, and the blue sheen neutralizes any red from the permanent color. It improves my hair condition, reduces red tones and makes my hair shiny.