Kennywood left the first two hills completely untouched except for a new paint job (black supports and green track). After the apex of the second hill, the track changes from Arrow to Morgan. Here's a good picture of the transition:
http://kennywood.coasterbuzz.com/gallery/img.asp?PicID=33. As for the paint job I don't know. Seems odd, but maybe they did it on purpose to make it a bit more obvious that there was a change to those who aren't riding it?
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A New World. A New Technology. One Last Hope for Salvation. Neon Genesis Evangelion