Hi fellow geeks, i'm foiling a clients hair next week, she currently has 2/3 inches regrowth and bleach on mid l and ends, she is a base 7/8, she wants to keep with the bleach but also wants a caramel added to break it up, i was thinking of x2 bleach packets with x1 7/38 wella koleston, i have 7/37 but worried it might come out too gold? Any thoughts or different ideas? Much appreciated, a little low on colour confidence x