Wondering if this is going to happen or not, but I'm definitely interested.
There are two reasons that a more "normal" color scheme might be a bit better:
1. There is literally no way (currently) to purchase new ALPS keycaps apart from buying a new-old-stock board with pad-printed ones. If there were already many options, blue might be nice, but it seems strange as the only option.
2. ALPS boards are not created equal, especially in the spacebar department. I use 101 layouts, which have a longer spacebar than those with Windows keys, and with the spacebar provided (with the cherry stuff going on), I would have no way to stabilize it. In other words, I would be using a stock white spacebar which would stick out like a sore thumb among the blue and grey.
No matter what happens, I would have to use at least a few keys from a different board, whether it be the spacebar, slightly different caps lock, or even the alt and ctrl keys; the ALPS diaspora will make it very difficult for many to match such a specific color scheme.