1 So the NFL decided that their member clubs could use a secondary color helmet beginning this year. In years past, only one color was approved but a team could decorate as they wished as long as the league gave approval. This meant mostly it was a throwback version indicative of a once-long ago uniform. But each time, the shell color was the same. The lone variant version was approval of a brown helmet to emulate a standard-issue leather helmet. The Packers were the ones which mainly utilized this look with their blue and yellow unies with a solid brown plastic helmet.