its the lights around...
outside, street lights are "sodium" something and they give an orange cast.
inside, fluorescent give a green cast. tungsten looks red.
the camera should give white balance settings and you can set it before shooting.
i only have the free version of neatimage so they dont let me edit pics over a certain resolution (1024px i think) and my PS has an action set up for 900px...so the pics will be smaller for that reason, since i can't afford any software at the moment and cant "find it" on the net due to my wifi router
that pic i posted...if youre ok with its size, i can do a few more...