My friends daughters unqualified friend coloured her hair a crazy colour they just "mixed a few colours together" (don't you just love teenagers) it turned out purple which she liked... A patchy purple! It's now faded to a minty green and she's turned to me I've told her I don't have much experience dealing with crazy colours as when I've on the few occasions done vibrant colours I've used directions! She's wanting to get it all a light ash blonde colour which I've attached a pic of...
Green hair
Green hair