In Aura Kingdom 2 there are five different grades of equipment your character can equip. All gears that you equip will provide your character unique stats.
The five grades of gear in order from worst to best are; blue, green, orange, purple, and gold. The quality type of gears from worst to best are; green, blue, and orange. There are 4 types of gear; Attack, Critical, Defense and Evasion. You can always check the details of the gears you have equipped to make sure you have equipped the best ones by tapping the bag icon in the bottom-left side of the screen to open your inventory.