There are so many versions of the "blue" for the military uniforms. Some like the dark navy, some like the lighter version (as in the anime). I personally went with the lighter because it matched a plushie version of Roy my friend had.
It really depends on your personal preference. As said above it's about fabric weight and drape. The heavier the better for the jacket and buttcape.
I've seen a variety of colors for the uniforms (all shades of blue) and each has their pros and cons.
Navigator of the Rumrunners Pirate Crew!
Official Dog of the Armistris Military- and I have a tattoo to prove it!
2012 planned conventions: ACEN 2012
Others- Bristol Renaissance Faire- Kennosha WI, weekends Jul. 7 thru Labor day weekend
~ Even the professionals had to start out as beginners at one point~
~ooo seam ripper, I shall call him shiny and he shall be my friend~