Ok, I won't ask.
It won't take much if you went with a darker blue mix of Quartz aggregate, and that's a good thing because those deep blue ones are very pricey. You just have to see what he deals with, and what will mix well with what. PB will be able to tell you that. Mine does custom blends all the time, but all I know for sure, is that they have to be compatible, preferably of the same brand. Honest, a true quartz finish is more durable and longer lasting than plain plaster. If I could afford to have someone put in Wet Edge, I would, but the next best option for me is CLI. If you look at my thread, we are currently going to mix 3 bags of the light blue "Sapphire" with 9 bags of "Granite" for a 12 bag batch. Our PB hasn't mixed these before, so it will be an experiment. Kinda scary, but kind of interesting and challenging too. We are planning on experimenting with the blend before final application so we can adjust it. We want a little touch of Blue, but we are in the outsiders camp like you of wanting a lighter finish. I've not looked at one pool in all this with a light enough finish for us by a long shot. I kept hoping to see just one with something close to what we wanted, but no dice.
I like talking about this end of the build a lot, and think some people take it too lightly. It's so important, and it determines what you will see every day. To me, the durability and appearance of the water color is a huge deal. Color is a matter of taste and subjective, but I like seeing the natural blue hue even a white finish will give off. It's all lost with a dark bottom, and that's why I don't prefer them. It's all in what you like, so no right or wrong, just what floats your boat. See what PB says on the blend and work it from there is my best suggestion.
