blue gradient watercolor background abstract cloudy or smoke grunge mottled texture with bright color splash

background blue green gradient design abstract texture backdrop backgrounds pattern paint water ocean paper textured grunge watercolor painting color light dark purple watercolour wallpaper smoke turquoise teal sky marbled navy splash wash border brush strokes inky sea cold fresh aqua ink cloudy cerulean blurred spray vibrant cyan art grungy painted colorful rough indigo snow misty bright vignette illustration stains dot explosion mottled stained splatter drips drops blob blots splat blotchy colors neon brushstroke shape speckle canvas droplets spots bubbles surface