Why are barns in the United States often red?

https://yall.theatl.social/post/176216

Why are barns in the United States often red? - Y'[email protected]

Farmers originally used to seal their barns with a combination of linseed oil (red-ish) and iron oxide (rust, red). Then when paint came around, apparently red paint was the cheapest. bobvila.com/…/solved-why-are-barns-painted-red/
Solved! Why Are Barns Painted Red?

Any trip through the countryside might produce the same question: Why are barns red? Is it a matter of agricultural tradition or a product of necessity?

Bob Vila
Yeah red dye goes a long way and is easy to make
Except car pigments? I hear that they are the most expensive.
That’s because da red wunz go fasta. Requires extra points to buy, more spensive.
Didn’t realise orkz were car salesmen all along
We need da purple wunz! No coppah gettin us in a sneaky kaw!