From Dota 2 Wiki
Not to be confused with an item's Quality.
Rarity is a property of cosmetic items. It is represented in-game by the item's color theme. Rarity is a purely cosmetic property, and has no effect on gameplay.
- Items have both a Rarity and a Quality value.
- In general, rarer items tend to drop less often, and have more customizations.
- Rarity does not determine whether or not an item is tradeable or marketable, Quality does.
|Immortal||#b28a33||Items released with Valve events that can no longer be obtained except from other players.||Play Sound|
|Arcana||#ade55c||Items that grant heroes extensive customizations, including models, animations, particle effects, icons, etc.||Play Sound|
|Ancient||#eb4b4b||Items gained from special events that are no longer obtainable.||Play Sound|
|Dota Plus Access||#fff34f||Temporary items for Dota Plus subscribers. Will expire after a time.|