The rainbow on NFL hats and apparel is part of the Crucial Catch program, a partnership between the NFL and the American Cancer Society that raises awareness for all types of cancer. The rainbow is meant to represent all types of cancer, with different colors representing different types of cancer, such as red for blood cancer and lime green for non-Hodgkin lymphoma. The NFL has been wearing multicolored/rainbow Crucial Catch apparel since 2009, and the program has raised over $27 million and funded 657,800 cancer screenings for over 1 million people in under-resourced communities. The NFL previously wore pink in October for Breast Cancer Awareness Month but started raising awareness for all cancers with its multicolored gear in recent years. The Crucial Catch program typically runs from Week 4 to Week 6 of the NFL season, and the multicolored gear includes helmet decals, captains patches, wristbands, sideline hats, and quarterback towels, among other items.