-Koi Coloring Brush Pen. Explore the vibrant possibilities of these creamy, blend-able, odorless watercolors. Koi watercolors capture the interest of professionals, fine artists, and students alike when applying to dry or wet paper. Combine an array of colors to match subject matters, spread color easily and evenly across paper, create spontaneous washes with soft edges and layer, merge and adjust color. This package contains twelve assorted fine-quality transparent watercolors. Conforms to ASTMD 4236. Imported.