I keep getting these purple tones from these Freedom Tower photos.  I posted an older image a few weeks ago that was similar in tone and this quickly reminded me of that.  We just missed the sunset on this flight so we caught the cityscape just in time for blue hour.  Blue hour is easily one of the best times for a FlyNYON flight because even though you don't get the nice warm glow of the sunset, you have the dark ambient light balanced out by all the twinkling city lights turning on bellow. It's really something that's truly unique to any photo experience...