If I could only have two of them ... in an ebike lineup in a bricks and mortar store, I think I'd sell more of the green and grey. If I was selling online only and primarily though my own website I think white and grey.
White and grey would appeal to most folks (or more accurately no real issue with either, so the bikes will be sold on their other attributes). But in a competitive line up I think the green would help the bike to stand out a bit against that other competition vs. the white (plus it has a bit of a retro vibe, it takes me back to the old Bianchis). The grey is just going to appeal more to the male buyers no matter what the circumstances.