A third jersey, alternative jersey, third kit, third sweater or alternative uniform is a jersey or uniform that a sports team can wear instead of its home outfit or its away outfit during games, often when the colors of two competing teams' other uniforms are too similar to contrast easily.

Away colours or road colours are a choice of coloured clothing used in team sports. They are required to be worn by one team during a game between teams that would otherwise wear the same colours as each other, or similar colours. This change prevents confusion for officials, players, and spectators. In most sports, it is the visiting or road team that must change.