Hi guys, hope you can help a newbie. Client is base 5, about 40% gray. I used Wella Perfect 6/0 (my mistake, thought she's more of a 6 but she's really a 5) & 7/1 at 50/50. Problem is color came out muddy and now is seriously brassy orange. I'm looking to get an ash brown, so I'm going to use 5/0 + another shade to correct the brassiness.. any idea? I'm guessing I need something blue based but looking at the Wella chart I don't see any 6 level blue based shade. Any help would be tremendously appreciated.