I had a hard time getting the old one off the wall so I ended up cutting the wires. (uh oh).

I lied last time and the one is black and not brown. I see that the whites were connected to each other and it appears that the blacks were also, but I can't figure out where the blue was connected. This old fan never worked and the pull chains were gone so I'd take the bottom off of it to see if there was a place that I could connect the chains and the wires were just a mess!!! It was like they'd disconnected them to shut the fan off...
Coming out of the ceiling are the ground, solid black, solid white and a light blue. The fan has a ground, solid black, solid white and a black/white combo.
The only difference besides the new fan being bigger, is that it also has a light where as the old one did not.