I'm totally confused, so I'm with you.
I had thought ink blue was a bluer, richer blue than navy, so what do I know.
What I have learned though is to give up on names and just try to look at the color! I don't wear typical navy well either--it's not really enough of an improvement on black to make a big investment--but I'm finally learning that some blues may be good for me, after I've eschewed them for years. Brighter navy and medium denim-y blue can work and so I'm keeping a lookout for some of those as an alternative to black and even to gray.
More options!