Published: Sunday 23rd of April 2006 05:24:30 AM
The sky needs a little punching up for contrast -- as do some of the other colors.
If you aren't wedded to authenticity, you could even think of dropping in a different sky color, but I know this thought is anathema to many :->.
Alternatively, have you tried a b&w or duotone effet? It would let the contours of the building show without being distracted by the lack of punchy colors.