Pebble sheen color selection has been difficult. We are looking for a lighter water color without green cast. Cool blue, aqua blue, suggestions?

My pool is PebbleTec in Tahoe Blue. As you can see from my avatar photo of that pool there is very little green–at least to my eyes! However, PebbleSheen is not available in that color. My guess is Cool Blue or Auqa Blue should give you what you're looking for.
Good Luck!