Solid Sky Blue 6x6 Glossy Porcelain TileWaterline Pool Tile The solid collection is a great choice if you want to keep things simple, clean and modern. Solid colors are not only used for commercial projects, but also for residential swimming pools. These tiles are suitable for swimming pools, spas, and not only meet but also exceed the standards for residential applications, including kitchen wall backsplashes, showers, and bathrooms.