The yellow teams would be covered by the 2nd kit. There is one team that could be called green in the pro leagues and that is Plymouth, but they are playing in dark green and white stripes that shouldn't clash with the third one. So that only leaves the possibility of a green amateur team reaching the third round of the FA cup, and drawing Norwich at home. Even then that shouldn't clash with the third kit. which is predominantly yellow. But it would be unlucky if they came out with these 3 kits only to draw Burscough FC away in the 3rd round.