colorful abstract watercolor texture. multicolored watercolor spots merge into one big spot on a black background.

abstract aquarelle artistic backdrop background big black blot blotch blue blur brush brushstroke color colorful decoration design digital drawing drop dynamics graphic green illustration image liquid merge multicolored one paint painting pattern purple red slick smear space speck splash splashes splatter spot spots spray stain stroke swab texture textured top vibrant wallpaper wash water watercolor watercolour wet