Loading... Please wait...This innovative product line combines regular and small size pebbles. The two pebble sizes interlock and create a tight compaction that gives the finish an even smoother texture than single-sized pool finishes. Glossy black pebbles and a small amount of blue color quartz along with a sparkle of ocean shells make up this finish. The watercolor, in most cases, falls into a black bottom dark hue. The watercolor hue cast by black bottom pools can be either blue or green. Because of the intense color, they are highly influenced by their surroundings and sunlight.