Awesome building, I'll raise a glass to that!
I agree with OSHIROmodels that the blue windows look off. Take a look across the street. I've observed that even buildings right across from my house, the windows just look dark, even when, or especially when, the curtains are parted. Maybe not pure black but charcoal black at least. If you view at the right angle close enough, you may see the sky reflected, but that is going to appear blue-grey. I think the impression of stronger blue is one of those things the mind does, similar to how it can give people the take-away impression that tree bark is brown.