Sounds like you and your PB are on top of keeping things to spec. Awesome. Keep it up. I've been amazed here as I read about what PBs get wrong, forget, overlook, etc.
Does your PB have any pools with that finish that you can visit? Pictures and swatches are not the greatest. Of course, it'll take on its own color and personality in your yard, but seeing someone else's pool with that finish might be worth your time, if that's possible...
Sounds like you've already figured this out, to some extent, but keep in mind that depth affects color more than you might think. I have a deep aqua color (modified Tahoe Blue), that looks one way in the deep end, a little less blue in the shallow end, all the way up to the top step, which is a med-dark grey. Doesn't seem to have a bit of blue in it.
So as you look at pic's or pools, it's the shallow end that'll be your color...