Blue/Yellow/Green/Red/Orange- Drops, Crafted, rewards
Purple - Empire Side PVP Champion, Columni Raid gear
Red/Black - Empire PVP Battlemaster, Rakata Raid Gear
Magenta - World Drop
Cyan - Republic PVP Champion Equiv, Columni Raid Gear
Blue/Black - Republic PVP Battlemaster Equiv, Rakata Raid Gear
Yellow/Black - Pre-Order
White - Not ingame yet
Black - Not found/not ingame yet.