For the 2016-17, 2017-18, 2018-19, 2019-20, and 2020-21 College Football Playoff and Bowl Games, I put together these PDFs documenting all of the helmet matchups that occurred.  The bowls are broken up into 4 Tiers; for the first three seasons, the final two pages of the PDF contain a comprehensive graphic of all of the helmets worn throughout the bowl season, sorted by conference, as well as the records of different helmet colors.