Are undershorts allowed to be a different color than the main shorts if the main shorts have a dominant color?

The assertion that undershorts can be any color aligns with the guidelines provided in the Laws of the Game concerning players’ kit regulations. Specifically, the governing bodies such as FIFA and USSF allow for flexibility in player attire, provided that the primary color of the match kit remains dominant and easily identifiable for referees and spectators.

In practice, this means that players can wear undershorts that differ in color from their main shorts as long as the main shorts have a dominant color that maintains the team's visual coherence. This approach considers player comfort and performance without compromising the referee's ability to identify players' teams during a match. Each team's uniform should reflect their identity while allowing individual expression through clothing choices like undershorts.

Such allowances are instrumental in fostering a player's freedom in their choice of attire, leading to more comfortable and functional wear during matches.