i saw so many flashes of bright white and dark green flashing from all sides of it for the first full 5-7seconds, then it turned to more of a contained bright white as it finally disappeared off into the distance (navigationally SW from my viewing point downtown.. the radiance of its lights were reflecting off of the glass of denver's few skyscrapers and it was an absolute sight for sore eyes... honestly thought it was a UFO for the following 36hours)