I'm not sure if you already made a decision, or are still looking for feedback, but this response may be helpful for you or others looking. We ended up going with Ocean Blue Pebblesheen, as my wife also had concerns about black being "too dark." It's funny, because Ocean Blue is nearly as dark, but pushes more blue than green. Someone explained it to me like this, and I found it helpful, so I'm passing it on. The darker plaster/pebble colors aren't really coloring the water, but rather providing the backdrop which gets amplified by viewing angle/distance. The water does look darker, but remains completely transparent, assuming your water chemistry is good. How dark the water appears is HIGHLY dependent on off-axis viewing angle. For instance, in our 9' deep end, I can easily see the bottom from directly overhead, even in the shade or at night. However, if I move further back and look at the same spot, the greater the viewing angle, the darker the water looks. For me not to be able to see the drains in the deep end, I have to move to a pretty extreme angle. At that point, the surface of the water turns into a mirror and the bottom disappears. This does happen some when viewing from my house or from far away points in the yard. However, it does not happen anywhere around the pool deck, unless I drop to an angle almost level with the water surface.