Hi, I have a client come in yesterday who's hair was bright red, base 6.. And natural base 5 with about 30% grey.. She is wanting to go back to brunette with lighter brown highlights put through.. With the red, I am aware that I need green to neutralise but what is green in matrix?! Am I going mad as I can't see that any of the colours contain green?! Please help!! Advice would be appreciated!! xx