HI i had my hair highlighted about 5 mths ago , i let it grow , so now my roots are pretty long my hair looks dry and it looks terrible. i want to go light platinum blonde with a bit of a golden blonde but i want to get rid of all the roots as their dark. the colours in it now are bleach highlights and dark blonde streaks plus dark roots which are about 2" long. would it be ok to get the colours i want or would it be best going 1 colour thanks. as it costs so much as when i get the highlights done 2 months later i got to pay the same price to have it redone to get rid of the roots.