For some reason, many owners have said that their newly plastered pools have green tint for the first few days.
Mine was the same way, eventually turning seriously cloudy blue, due to heavy brushing of blue plaster and no pump/filter running.
(As I type, there's someone outside plumbing my pump/filter.)
So IF your pool is plaster and brand new, give it a few days before you start not liking the color.
Good luck,
Steve