390 LBIA #17 Could it be more blue?

This was shot in front of the Helsinki Cathedral at around 5pm on 9th October 2011. I've never seen such a true blue sky like this and even the photograph doesn't fully describe it. Is it because of the high latitude of the city? The color almost shocked me but at the same time it was conformable to see, or more precisely, to be bathed. When traveling, the color of the sky in the city you visit rules the way how the light to be shed on everything you see, so the impact should not be overlooked.