what is the percentage of grey? you are meant to add base from the same range however it might throw you some unwanted warmth. Personally, I would tell the client I will be carrying out a strand test to enable you to reach the perfect target shade. no questions will be asked and you can take it from there. this way the client knows she is in good hands and you end up with the perfect colour she has always wanted.
look forward to hearing how it went. You know your stuff!!!
Hi, thanks for your reply. I can’t do a strand test as this is just a root touch up.
the client has gone lighter over the past year, so we’re just trying to find a base colour that will leave her around a level 8 that doesn’t glow warm like 88/0 does on her.