Purple nail polish is one of my favourites, which is why I have more new polishes than other colours!
I managed to wittle my way down to the top three;
China Glaze is a dark purple colour with a subtle fuchsia shimmer running through it.
Crown of Thistles is a stunning orchid holographic colour. One I wore a lot during 2015, and something which really comes to life when in direct sunlight.
However the winner of this battle is Kiko 255, a dark purple packed full of micro multi glitter. Almost galaxy like and gorgeous enough to wear as is.