The International Football Association Board (IFAB) is planning to introduce blue cards in football as part of a trial to address the escalating issue of ‘participant behavior’ on the field. Along with the existing yellow and red cards, a blue card could result in a player’s temporary removal from the field for 10 minutes. The option to combine colors adds complexity, as a player reentering the game from the sin-bin and receiving another blue card would escalate to a red card, leading to permanent dismissal. Similarly, a combination of one blue and one yellow card would also result in a red card. IFAB is set to propose these recommendations on Friday, paving the way for trials in various competitions, reflecting the concerted efforts of international football authorities. Recent initiatives to address participant behavior include tightened rules preventing players from confronting referees and increased financial sanctions for rule violations. While trials of sin-bins have been successful in grassroots competitions, top-level competitions like the Premier League will not feature sin-bins, and UEFA has no plans to introduce sin-bins in the upcoming men’s European Championship or the Champions League.