Four-color deck

A four-color deck is identical to the standard Anglo-American playing cards except for the color of the suits. As in a standard deck, hearts are red and spades are black, but in a four-color deck, clubs are green and diamonds are blue. Four-color decks are almost non-existent in real-world use, but have become a somewhat popular option in Internet poker software interfaces due to the higher rate of play and ability to play on multiple tables simultaneously.

The four-color deck was first developed and publicised by Mike Caro. It was introduced at his World Poker Finals at Foxwoods Resort Casino in 1992. His original design was not a success, however, due to the choice of colors.

Attempts have also been made to introduce four-color decks in bridge, where they are often called no-revoke decks because they are perceived to reduce the risk of a player accidentally revoking (illegally playing a card of a suit other than that led).

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• Four-Color Decks sells four-color poker decks.
• Carta Mundi until recently manufactured Spectrum no-revoke bridge decks with blue spades, red hearts, orange-yellow diamonds and green clubs, which may be still available. They have now been replaced with Avonmore no-revoke decks, which use the same colors as four-color poker decks.