It's a tad darker, but FS15042 or 35042 Dark Sea Blue (gloss/flat versions respectively) is a very attractive bluish-black... I usually use the flat when I'm modeling SR-71's "at-speed," exaggerating the color change just enough to make it visible.
You doing yours gear up or down? I just got my set of G-Factor gear, and now I gotta figure out how to lop it off the sprue... great looking product, but not for a first-time venture into aftermarket without appropriate tools.
You're off to a great start so far! Captures the effect very well.