I already have my hair highlighted with bleach (no colour), what should I use to do my owns roots pl

Hair colouring can be as subtle or as out there as you want it to be. Best done in salon with a skilled colourist, blondes can go blonder, brunettes can be boosted, greys can be covered, or enhanced with a spot of granny hair. Not to mention every crazy colour from pink to blue to green can be achieved in the right hands.