Common
This rarity appears as a drop most often. Available as a drop or rarely in chest (uncertain about which chest). It's name color is white.
Rare
Easy to find like common, a little more rare. Available as drop and in chests. Name color is green.
Epic
A little harder to find than rare. Available as drop and in chests. Name color is purple.
Legendary
Hard to find. Available as drop and in chests. (Best gold markers imo). Name color is pink.
Mythic
Currently only available in stable for limited time (Costs 250 Platinum), Locked Crates, and Elite Golden Pirate Chests. Name color is orange. Between Legendary and Arcane.
Arcane
Currently available only in chests (Locked Crates). Name color is red. Uber rare.
Vanity
Currenty only available in store for 15 platinum each. Name color light blue. Refer to Vystirch's guide on vanities,
http://www.spacetimestudios.com/show...-With-Pictures