Meant to ask if the film was 64t - thought the tungsten film might have enhanced the 'blue' feel. Hope so - I've a couple of rolls languishing at the bottom of my freezer and would love to use it for stuff like this...!
It's daylight film, the blue is from early morning light and genuinely foggy conditions - as opposed to smog. Probably underexposed by a stop or so (don't remember for sure). But I don't want to discourage you from trying your tungsten in daylight...