What is the reason that some American football balls are brown/tan

Pro Football Journal: Fifty Shades of Brown?

Are footballs made out of pig skin? - Quora

Leather Head Sports Custom Leather Balls

Are footballs made out of pig skin? - Quora

Wilson GST Composite Football - Junior Size, Tan

What is the reason that some American football balls are brown/tan

Why are footballs brown when it makes the ball so difficult to see

Should you sand down a leather football does this make the ball

Why are footballs brown when it makes the ball so difficult to see