Manic Panic Purple Haze Cream Hair Colour. Manic Panic Semi Permanent Hair Colour. MANIC PANIC uses superior ingredients that are guaranteed vegan. NOTHING works like MANIC PANIC HAIR COLOUR. Probably the brightest most outrageous hair colour available. This famous cream formula of hair colour is in a cream base that has the added benefit of conditioning the hair. Packaged in our traditional 4 oz (118ml) tub. Go on show the world how different you can be.