brown stains

• discolorationAltered surface pigmentation
• rustIron oxide coating
• coffeeBrewed bean beverage
• teaSteeped leaf beverage
• dirtLoose dry earth

smudge · mark · blotch · patch · muddy · sepia · tarnish · aged · yellowed · dingy · soiled · grimy · faded · stained · splatter · residue · tobacco · gravy