What is an away jersey?

Answer 1

An away jersey is the uniform that the team wears in the team colours as visiting players, These jerseys are differently coloured than the colours that they wear on their home field. For example if your colours are green and white, the home jersey might be a green jersey with white lettering. An away jersey would be a white jersey with green lettering.

The jersey is so designed because the visiting team might have the same colours as the home team, so the play can be distinguished between the visiting team and the home team. If both teams wear the same colours, the away jersey tells that the team with the inverted colours are the visitors.