Here in Vancouver, B.C, it's usually clean (I live in North Van, so pretty far from the pollution-ness) although now and then we get an interesting deep purple shade.

I live in a rural town, with no more than 4500 people (Goes up to like, 20,000 during the summer [Tourists]), so the sky is a dark, dark black, and I can see many, many stars.

The sky is black.... or DARK, DARK blue, but I live in a very rural town.

i live near Detroit (auto capital of the world = lots of cars) and the sky is blue...... (or sometimes greyish, but that's just MI.......too many **** clouds)

I live out on a farm, so we have a nice blackish blue sky at night. :3