The rainbow on NFL hats is part of the Crucial Catch campaign, which is an initiative by the NFL to fight cancer through early detection and risk reduction. The NFL-issued Crucial Catch gameday apparel features a multicolored logo representing all cancers. In 2021, the NFL introduced its new logo consisting of rainbow colors, which represented complete support and solidarity with the LGBTQ+ community. The tie-dye designs on NFL apparel were introduced to support the American Cancer Society (ACS), and all the revenue generated from the sale of these tie-dye designs will be forwarded to the ACS. Therefore, the rainbow on NFL hats is a symbol of support for both the fight against cancer and the LGBTQ+ community.