Stain colour guide Anthracite – an oil stain of bluish-gray dark tint. Rosewood – a water-based stain of dull red tint, like burnt umber. Weathered wood – a water-based stain of cold brown tint. Old wood – a water-based stain of yellow-green tint. Also called “Palo santo” Natural birch color – no stain, just varnish applied. Black wood – an oil-based stain of warm black tint. The bird will be painted red or yellow unless otherwise noted. Oak – a water-based stain with brown tint. American walnut – an oil-based stain with dark brown tint.