Ranking NFL's current throwback jerseys: Eagles' perfect 'Kelly Green'; high marks for Patriots, 49ers
NFL approves alternate helmets beginning in 2022
A new rule could have kelly green uniforms back for 2022 [UPDATE] - Bleeding Green Nation
NFL to allow alternate-color helmets for 2022; will Packers consider them for new throwbacks? - Acme Packing Company
NFL to allow alternate-color helmets for 2022; will Packers consider them for new throwbacks? - Acme Packing Company
Contest results: Designing Packers' new 2020 alternate uniforms
Green Bay Packers set to wear throwback uniforms once again – SportsLogos.Net News
The Patriots will wear their red throwback uniforms twice in 2023 - CBS Boston
Packers alternate uniforms will return vs. Jets in Week 6
Bears unveil alternate orange helmet for 2022 season