abstract art backdrop background color colorful colors colour colours hue hues paint painting pastel pastels rough texture textures tone tones artsy canvas paintings paints series variety various grunge grungy pattern shade shades variations city dark decay design gloomy iron metal old rust rusty scrap urban vintage architecture brown dappled decoration decorative desktop golden grey ocher plastering structure structures stucco wall wallpaper blank empty flier floral flower flowers flyer paper papier petal petals variation