I saw a Instagram post yesterday from MT, detailing the newest color option for the Exocet. It's OD green.
I don't think MT has a blue in color Exocet out, just yet. But anodization is so easy, nearly all color options are possible.
In trying to figure out your predicament, I have to say, I have seen some pics of the black that appear to have a flat dark blue hue to it, presumably from the lighting. Perhaps these pics is what started the rumors?
So here are all the color options now available to choose from. Virtually every color they make the UT in. See attached pic.