Items in Kingdoms of Amalur: Reckoning have varying degrees of rarity. Observe the color of an item's name to determine its rarity, which dictates how powerful and valuable it is. Some of the rarest items in the game come in sets, and the more items in a set your character has, the more powerful each item becomes.
White Title - Common
Green Title - Infrequent
Purple Title - Unique
Gold Title - Set Item
Your character has a maximum number of items he or she can carry at any time. To increase the amount of items your character can carry, you must buy Backpacks, which are sold by merchants in most cities.
Certain pieces of equipment have requirements that must be met before they can be used. These requirements are based on your character's level and/or the number of points you've invested into your character's Abilities.