Indoors it's more of a brown button. Bring it outside and it takes on a reddish tinge. When I was a kid I had a pair of penny-loafers that were just the same: Burgundy. It's an indecisive color that can be a little maddening when you're trying to decide if it's a true red that leans to brown or a shade of brown with reddish leanings. Like all the buttons on this blog, this is a tried and true Bakelite button.