It is common that you can mess up in your past and it could come back one day. Sometimes these mess ups come back to our minds every once in a while. It sometimes stays for a while and haunts you but eventually it leaves your mind and you're free from its haunting. -- In the skin I made the girl's past haunts her mind. The purple particles are the memories and the reason it is in black and white (or close to it) is because she pays attention to the memories to often that it is what sticks out most to her - and in the skin.


 Thanks! :D