How many different cards are there in soccer?

Soccer has two types of cards, yellow and red. Yellow cards are used to caution a player for a major breach of the rules, called "misconduct". A second yellow card, as well as several egregious forms of misconduct, warrant a red card, which indicates that the player is sent off and can no longer play in that game or remain in the vicinity of the pitch.

Some similar games (which do not follow the IFAB Laws of the Game) can employ blue, green, black, white, or even so-called "soft red" cards to mean various things, but they aren't part of the soccer / football that most of the world plays.