Eh, maybe but I doubt it, they could have used multiple coats of whatever color they liked. But farmers might want to draw attention to their barn and the best

Eh, maybe but I doubt it, they could have used multiple coats of whatever color they liked. But farmers might want to draw attention to their barn and the best way to do that is paint it red so it clashes with the green all around it because they're polar opposites on a color wheel. Half mile away you'd see the red barn but if it were yellow or blue, maybe not.