deep dark night watercolor sky cumulus cloud . abstract dark blue watercolor background.hand drawing on textured paper

abstract art artistic azure backdrop background black blots blue bright chilly clouds cold color colorful cool cosmos cumulus dark deep drops dusk effect evening fiery grade gradient heaven ink landscape light nature night nightfall ombre paint painting paper rough seventh shining sky skyline solitary space spot spots stain texture turquoise ultramarine universe watercolor watercolour watercolours wet white