watercolour drawing of deep black color gradient.

abandoned acrylic alcohol art background banner beautiful black blackboard board card chalkboard charbone charcoal chemical coal color creative crow dark day dead deep design dirt dirty drawing drawn ebony effect explosion fog gradient graphic gray grease grey grunge halloween hand illustration industrial infection ink mist monochrome mystery night onyx paint paper pattern pigment plain pollution poster raven sandstone scary scrapbook secret site sketch sketchy slate slateboard smog smoke solid stain surface template texture vintage virus wallpaper water watercolor watercolour web