As it is a really dark blue without any purplish tone :
About:
VGC - 72019 Night Blue
VMC - ... hard to decide. I'd go with 048-Dark Sea Blue (with Oxford blue / dark prussian blue close, but I think they have a purplish tint, that's not in the navy one).
If you don't have any of the paint yet, then the best is to buy the Scale75 one as they can be mixed with other acrylics without a problem.
If buying the VMC one, than instead I'd suggest the VAC DarkSeaBlue. Pigments are a bit finer, it behaves a bit differently, but for me that difference helped in my color transitions.