For DOS profile pics it isn't just purple it can be any color..
I'm fairly sure it's supposed to be purple, but you don't have to participate in it if you don't want to.
It's not supposed to be purple it can be more than one color and people who support it and are participating in it most likely aren't talkingoing at all till it's over. People at my school do DOS.
It actually is supposed to be purple. It's the color for DOS.