NFL not letting Rams use preferred throwback uniforms more often, because it's the NFL
Super Bowl LIII - Wikipedia
Super Bowl 2019: For Tom Brady, Experience May Be Overrated
Rams are home team, will wear retro blue jerseys in Super Bowl 53
SportsLogos.Net - Here it is, the uniform matchup for Super Bowl LIII - New England Patriots vs Los Angeles Rams /01/20/los-angeles-rams-confirm-throwback-uniforms-for-super-bowl/
Los Angeles Rams Confirm Throwback Uniforms For Super Bowl – SportsLogos.Net News
Los Angeles Rams - Wikipedia
Super Bowl LVI: LA Rams to wear popular throwback unis for big game
Los Angeles Rams will wear classic colors for the Super Bowl in Atlanta