Final answer:
The team manager or uniform coordinator is usually responsible for ensuring that team members wear identical shirts, with oversight from league officials or referees.
Step-by-step explanation:
The person responsible for making sure that each team is wearing exactly the same color shirts is typically the team manager or a designated uniform coordinator. In organized sports leagues, there may be specific regulations in place to ensure uniformity, and the compliance with these rules is often overseen by the league officials or referees prior to the start of a game. It is important that teams wear matching uniforms to avoid confusion and to uphold the professional appearance of the team, as well as adhering to the rules of the competition.