abstract background blue concept creation design fill graphic illustration image landscape paint pink purple scrapbooking smear style texture trees underpainting vector wash watercolour copy corrode corrosion decay ferro grunge grungy hydroxide industrial iron metal oxidation oxide rust space steel surface wallpaper decayed rusted brown backdrop card cardboard color colour colours hue isolated mail package paper papier pastel pastels postal rough shade tone canvas colors hues painting series shades textures tones variations various tints