Rarity

Rarity is a statistic applying to all items, that loosely indicates their value and the difficulty with which they are obtained. An item's Rarity is indicated in-game by the color of its name text, as displayed, for example, when rolling the cursor over the item in an inventory slot. An item's Rarity can be raised or lowered by up to two tiers depending on its Modifier.

The Tremor Mod adds one rarity to the game, Light Orange, and makes use of all other vanilla rarities with its items.