I have a client who has beautiful natural auburn hair with bleach highlights. It s gorgeous, however she hates her natural colour and wants to go all over blonde. I did a test cutting of her natural hair colour (base 7) with Wella Koleston 9/1 and 9% and its hardly lifted, also the bleached highlights turn a horrible muddy colour which I did expect to be honest. Any suggestions on lifting her natural colour without sending the highlights a horrible colour? She wants a nice ash blonde but just not sure this is achievable.