Why do they have to wear such brightly colored jerseys?

Brightly colored jerseys are an essential part of sports uniforms for several reasons. One of the main reasons is to help distinguish players from each other and from the opposing team, which can prevent confusion and errors on the field. The colors are also used to represent a team's identity, and to make the players easily recognizable to fans and spectators.

Additionally, brightly colored jerseys can also help with visibility and safety, especially in outdoor sports where lighting conditions can be poor. For example, in cycling or running, bright colors can make athletes more visible to drivers and other participants, reducing the risk of accidents or collisions.

Lastly, bright colors can also have psychological effects on players and their opponents. Wearing bold and bright colors can give a team a sense of confidence and energy, while making their opponents feel intimidated or overwhelmed. This can give a team a competitive advantage and boost their performance on the field.