The beautiful purple tone is all natural!
This is the north side of the Miami University campus which I attend. It was the day Modern Warfare 3 was released, so it was probably around 11PM when I took the photograph. I lowered the ISO to avoid noise and the extended exposure created an incredible glow that wasn't visible to the naked eye.
I have yet to show it to the campus president, but I hope that he will like it just as much as I do.
As always, feedback is appreciated.