Hi there new client has 100% white and numerous box colours on, roots a wishy washy pinky brown around a base 7, ends slightly darker not much just a completly different tone. She said she wanted to go lighter so used lighter colour for roots. Lol. I was thinking a wella 7/73 all over and few highlights as she wants to blend in with white coming through. Now just asking as I was taught add base in with tint for white. But on here I read by experienced geeks why add base? So now I'm not sure what is correct, I usually do add it in and covers better.