Same color jerseys - a problem and a solution

A friend bought one month before, a 2nd official jersey for his team.
Actually it was the 3rd official appearance of PAOK, which has the same main color of the 1st (the black).
So the game doesn't allow him to use both and he just throw away some $ for nothing.

A solution :
Now with the contest of U23, we can see that there is a circle around the young players who count for the contest.
(Personally I don't like it as it get me confused with the players who don't have it).

How about to be able to use two jerseys with the same main color but the second one could have a circle with a different color ?