NPT StoneScapes® FRENCH GRAY W/BLUE ACCENT SPEC Special French Gray with Special Blue Accent Pebble Pool Finish Parent Kit. Give your pool or spa the natural beauty of a pebble-bottomed stream with a StoneScapes® pool finish. An inviting selection of colors and textures allow pool owners to express their unique style. StoneScapes combines artistry with durability and comfort to create the perfect finish for any pool or spa.