Coffee Stains on Paper

You're looking at a close-up of a couple of dried coffee rings on what appears to be a light-colored surface, perhaps paper. The pale, yellowish-brown centers gradually deepen into a richer, darker brown along the edges, forming those characteristic marks left behind after a spill has evaporated. There's also a smaller, similar stain in the lower right, adding to the natural, organic feel of these everyday marks.

coffee stain - coffee ring - spill - dried - paper mark - brown