What are the differences between redshirting, grayshirting, blueshirting and greenshirting in college football?

There are a lot of 'shirts in college football. Here's what they mean.

College football scholarships

What are the differences between redshirting, grayshirting, blueshirting and greenshirting in college football? This video is a great, quick guide to, By NCSA College Recruiting

What are redshirts, grayshirts, blueshirts and greenshirts in college football? - Quora

Recruiting's color wheel: Redshirt, greenshirt, grayshirt, blueshirt

National Signing Day 2016: Previewing Illinois Fighting Illini football's latest recruiting class - The Champaign Room

lanthanum פרמטרים מקומט red blue shirt משל קליבר סמן

Expanded replay could be coming to college football

Redshirts, Grayshirts, Greenshirts, and Blueshirts

The Differences Between Redshirt Vs. Greyshirt What You Should Think About Choosing

College football's newest trend — the in-season redshirt-to-transfer: 'Why waste a year?' - The Athletic

What Does Redshirt Mean? And The Reasons Why Players Do It?