I have not seen the blue version, BUT, with mine the Stars are green. As this is my favourite colour I chose it and am very happy with my choice. It did not get as far as the bedroom where it was intended to go. It is in my Family room whilst I watch TV.
I’m assuming we have the blue lights one because the predominant colour is blue (although there are other colours in the patterns). I would imagine with the green one that the predominant colour will be green. Either way you can’t go wrong. They look absolutely awesome in a darkened room!