abstract modern watercolor dark background with blue marble s with contemporary gouache

abstract modern watercolor dark background blue marble shapes contemporary gouache fluid horror web template brochure paper abstract acrylic agates antique backdrop background beautiful blue construction contemporary dab dark decor decorative design detail drip effect fantasy floor fluid gouache grunge liquid marble messy motion natural nature oil old paint paintbrush retro rough shape sketch slabs splash splashes splattered stain surface surreal texture vibrant vintage wallpaper website