5-Color Format exists in slightly different variations in the online and offline Magic communities. 5-Color was initially a fan-created format, not supported by the DCI. The basic rules could be summarized as follows:
- Decks must contain a minimum of 250 cards
- Decks must have no less than 20 cards of each color
- No more than four of each non basic land card
- The game is played for ante, and ante cards, including Contract from Below, are legal
A full list of rules, including banned and restricted cards, is maintained at: http://www.5-color.com/
Due to the popularity of this non-sanctioned format, WotC created a similar format in the Magic online game.