A yellow card is used to warn a player, a red card sends a player off the pitch for the rest of the match. Two yellow cards equal a red card
The cards used in soccer (2) were the yellow card (warning) or red (sent off).
in the 1970's
red yellow blue
The first time a red and yellow card were used was in the 1970 world cup in Mexico.
1970 FIFA World Cup.
yellow and red card is not used in cricket.
Depending on the playing surface, it is normally a bright yellow.
The first major use for the red and yellow cards was in the 1970 FIFA World Cup. British referee Ken Aston came up with the language-neutral cards for cautions and dismissals. http://en.wikipedia.org/wiki/Misconduct_%28football%29
In soccer a yellow card is used for a minor foul. If you get two yellow cards in one game, you are given a red card. If a red card is given the player has to leave the game and a substitute has to enter the playing field.