I have someone who has gone from bleach full head with toner back to brown. They used wella 6/00 and 6/74 to prevent it going green, which succeeded but they have an orange/ginger tinge now. I have previously used 5/0 and 5/75 but they don't want to go too dark. Has anyone ever used 6/0 and 6/75 and can tell me how it turned out? Will it offset the orange or should I just advise her to use the 5/0 and 5/75 which really suits her tone