Commander colour identity, explained
Last updated: September 21, 2026
Colour identity is the rule that decides which cards are legal in your Commander deck. It trips up a lot of new players, because it is not the same thing as a card's mana cost, and the difference is where the surprises live.
The rule itself
A card's colour identity is every coloured mana symbol that appears anywhere on it: in the mana cost and in the rules text. Your commander's colour identity sets the boundary, and every card in your 99 must fall inside it.
The classic example: a card that costs two generic mana but has an ability reading "pay one black mana" has a black colour identity, even though you can cast it in any deck in every other format. In Commander it is black, and it cannot go in your green-white deck. Hybrid symbols count as both colours. Reminder text does not count, and neither does the colour of the card frame.
Basic lands are the exception you will actually use: a land that produces coloured mana has that colour's identity, so you cannot play Islands in a deck without blue in its identity.
Multicolour commanders in stock
Why it matters more than it sounds
Colour identity does not just restrict your card pool, it defines what your deck can and cannot do. Each colour in Magic has jobs it is good at and jobs it simply cannot perform, and your commander's identity decides which blind spots you are living with for the whole game. A deck that cannot destroy an enchantment will eventually lose to one.
What each colour brings
White has the most efficient removal in the game and a monopoly on board wipes. It is also the best at protecting what you already have. Browse white singles.
Blue draws cards better than anything else, counters spells, and answers permanents by bouncing them. It is the colour that says no. See blue singles.
Black kills creatures unconditionally, returns things from graveyards, and will trade life for almost any resource. Its weakness is enchantments. Browse black singles.
Red deals damage, destroys artifacts better than anyone, and generates huge bursts of temporary mana. It struggles to answer a resolved enchantment or a big creature cleanly. See red singles.
Green ramps, draws off creatures, and destroys artifacts and enchantments. It makes the biggest creatures and has the hardest time dealing with a creature it cannot simply out-size. Browse green singles.
Colourless cards fit in every deck regardless of identity, which is why artifact mana and utility lands are the universal staples. See colourless singles.
Picking a colour combination
Two colours is the comfortable starting point: enough tools to cover your weaknesses, a mana base that works without much effort, and a card pool that is not overwhelming. Three colours opens up considerably more, at the cost of needing real fixing. This is where mana rocks and fixing lands stop being optional.
Four and five colour decks are genuinely harder to build well, because casting the cards on time is a puzzle. If you are new to the format, a two-colour commander will teach you more.
Whatever you pick, browse multicolour singles for the cards that only work in your combination.
A practical check before you buy
Before adding a card to a list, read its full text box as well as its mana cost. If any coloured symbol appears anywhere on it that your commander does not have, the card is not legal in your deck. Deck building tools catch this, but it is worth knowing why they are catching it.
If the format itself is new to you, start with what Commander is.