The color of an enemy's shield represents which damage type it is vulnerable to. Using a damage type against the corresponding shield will do 200% damage. Using a damage type against a non-corresponding shield will do 100% damage.
|Damage Type||Description||Effective against||Subclasses|
|Arc||Related to electricity.||Blue shields: Captains, Knights (with Epic modifier), Harpies (with Epic modifier)||Bladedancer, Stormcaller, Striker|
|Solar||Related to fire.||Orange shields: Wizards, Centurions, Shanks (with Epic modifier)||Gunslinger, Sunbreaker, Sunsinger|
|Void||Related to gravity and dark energy.||Purple shields: Minotaurs, Psions (with Epic modifier)||Defender, Nightstalker, Voidwalker|
- ↑ 1.0 1.1 Reddit "Elemental Damage & Nightfall Burn Damage Calculations". Retrieved May 12, 2015.