Colorless has two meanings.
, a mana type that has no color.- Any card or ability that has no color.
Details[]
When a card is colorless, it means that the card, effect, or whatever it refers to is associated with Colorless mana produced by the Wastes basic land. This type of mana is denoted by the 
mana symbol.
This is not to be confused with Generic mana, which can be paid with any form of mana.
Cards that specifically created colorless mana (such as Sol Ring) now have text to display the new mana symbol. For example, Sol Ring was changed from "
: Add 
to your mana pool" to ": Add to your mana pool".
Some of the first cards to require colorless mana were released in the Oath of the Gatewatch set, representing the Eldrazi.
Comprehensive Rules[]
- 107.4c The colorless mana symbol
is used to represent one colorless mana, and also to represent a cost that can be paid only with one colorless mana. - 106.10. If an effect would add mana represented by a generic mana symbol to a player’s mana pool, that much colorless mana is added to that player’s mana pool.
- 202.2b Objects with no colored mana symbols in their mana costs are colorless.
| Colors of Mana | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Monocolored: |  Blue  Black  Red  Green  | ||||||||||
| Multicolored: |
| ||||||||||
