Today I was at MKE, and as I passed on the north side, I saw a red tail sitting at one of the new gates on Concourse C. I turned and went back; it was a 737, but couldn't make out any discernible logo on the tail; it looked red, with a white strip straight up the middle, almost like the flag of Austria turned on end. The fuselage was all white (maybe grey on the bottom), but I could not read any titles on it. Does anybody have any idea what that may be?

Cheers,
P. Valenstein