watercolor dark smoke color background texture. watercolour deep gray-green backdrop. stains on paper

abstract abstraction aquarelle art artistic backdrop background beautiful blot bright brush canvas color colorful dark decorative deep design drawing graphic gray graygreen grey grunge grungy hand illustration ink mark material modern old overlay paint painted paper retro smoke splash spot stain stains strokes template texture textured trendy vintage vivid wall wallpaper wash water watercolor watercolour