wavy abstract gray blurred grainy gradient background texture. wallpaper with a noisy soft pattern. nostalgia, vintage style

abstract gradient background colourful gray colours wallpaper graphic design modern blur soft bright template texture vector blue art poster light banner pink illustration smooth vibrant pattern web fluid purple set cover blurred trendy space futuristic mesh wave manycoloured effect liquid blurry shape website violet retro dynamic app booklet paper wavy grainy noisy nostalgia vintage style 70s 80s lo-fi texture pattern