watercolor dark teal blue gradient background texture. hand painted turquoise liquid ombre backdrop. stains on paper

abstract abstraction aged aquarelle art artistic backdrop background beautiful blue bright calm color colorful contemporary dark decorative deep dirty drawing gradient green grunge hand illustration liquid mark modern old ombre overlay paint painted paper retro soft splash spot stain stains surface teal template texture textured turquoise vintage wall wallpaper wash water watercolor watercolour watery