Hi, I got my hair redone a few months ago with my balayage freshened up. The hairdresser has gone too high and way way to light and I hate it. Just wanted something subtle. I'm naturally a mid brown. I've left it for about 6 weeks and I've been using brunette shampoo to help darken it which is a bit better but I'm still not happy. I'd like to get a box dye, just a mid brown - would it be safe to use as the lightened bits are a bit warmer without them going green and would they turn out lighter then the darker bits?