The emo or emotional punk movement belongs to its own attitude as I have previously said numerous times! The values are put on fashion, emo hairstyles and personality. With this type of hairstyle, everything goes - some women may dye their hair purely black, however others will want to dye theirs white or purple.
The aim of dyeing the hair a certain colour is to achieve that bold effect, be it black or bold white. The best part about it is that all emo hairstyles are artificially dyed so there is no need to conern about it looking natural as in most cases it won't. Sure there are some expensive dyes that will work hard at restoring the natural look and make your hair look naturally coloured but in my opinion it is not really worth it. Having emo hairstyles is all about personality and freedom.