Last night I permanently dyed my hair. The end result was fine but I looked at the back of my hair and it looks like half of it missed the dye. I have some highlights which mostly took the dye but the ones at the back obviously needed longer. Could I buy the same dye and just do that bit again? Or do I need to wait since it was permanent? Any help it appreciated images.digitalspy.co.uk/forum/smilies/smile.gif