Well bassically you can die it anucoulour staright away if you want but you may have to check what colour if its darker it should be OK but if your going dark to light its not best unless you waight 4 weeks for it to grow out, but if your going extreme colour bleach it blonde then add dark colour to turn it light ! Okaiiee hunn >? X

If you have just recently died it chances are it will fade a good lot after a good few washes, to get it back blonde you will need to go to your salon and they will use bleach on it, bleach is extremely damaging to hair and if you choose to do it yourself I'm 99% sure it will turn out shades of red, orange and yellow! So to save yourself a lot of money go with the salon choice :) although I must warn you the salon will probably not do it in one go, they will most likely gradually lighten your hair over a few weeks because, as I said, the bleach it really harsh on hair.:)