Did you see the second picture of a similar egg? It had to be the same chicken. Only the end of that one was really blue. Maybe I'll get a super blue layer out of itI have never seen an egg that vivid blue colour before.
But more likely, it'll be a cockerel haha. If it hatches, anyway.

100 miles would put you somewhere between Fairhaven and White River Junction so yeah, mid state south. Pretty fair distance from me
It is a couple of hours to Rutland from here.