I wonder if you could help. I've recently had highlights with a new hairdresser. She's put a lot in, I almost look full blonde. I'm probably a level 10 in areas, but definitely has a yellow tinge. My qualified friend works from home is going to put a toner on for me (dialight) she has the following shades. 10.21 10.12. 9.02. I get what the numbers refer to (vb bv) could someone give me a more in depth description on how these will pull on level 10 yellow hair? Thanks 
