Hi so I have a client that has been box colour her hair and it's turned out really dark at the moment it's probably round a base 2 with some warmth in she has coloured it 3 times her self from bleach blonde she's wanting to achieve a base 9 some thing that looks natural I use the colour brand NXT I was thinking to use there colour remover probably have to do it twice but then I am stuck on how to achieve the base 9 any suggestions please im not the most confident in colour corrections so any help would be appreciated thanks in advance x