We've just released the Purple Character Effect that coats your character with a vivid purple mist. Check out the video below or get yours here.
Due to its deep colour, the Purple Character Effect could be used as an accent in your outfit, or as a way to intensify the look of your Purple Necrotic Armour Set. For the ultimate purple outfit we'd recommend adding the Purple Skull Helmet, Purple Hooded Cloak and the Purple Weapon Effect. If you're using a Herald Skill Gem, replace its standard effect with the Purple Herald Effect or the recently released Celestial Herald Effect.
Source: http://www.pathofexile.com/forum/view-thread/2184054