Pools
Waterline tile, coping and deck are a set. Blue is not one colour — the same mosaic reads differently against a white shell than a grey one.
Bring this Tell us the shell colour before you pick the waterline.
Surfaces for pools
Deep blue onyx look Blue ground with white cloud breaks and thin dark fissures. Large format, so the pattern stays open. 
Pearl blue A translucent pale blue that lifts under a light. Pool coping and shower walls are where it is usually going. 
Blue hexagon mosaic Swirled blue and white hexagons on sheet. Pool waterline, shower floor, or one feature panel. 
Clouded blue Soft blue with pale drift and a dry gold line. Calmer than the storm slab and easier over a whole floor. See them standing, next to each other.
We are a showroom: the slabs are standing, whole, and can be moved around. Bring the measurements and we will work it out on the floor.