Quoting William Meng
What's the color scheme/theme? I'm not familiar with it.
Sorry I haven't got to you, the colour scheme is Bley (new dark grey)for the main fuselage of the vehicle. small spots of yellow (don't overload it) and grey for the greebles.
Minifigs: (use decals on main page)
Dark blue torso with grey, bley, or dark blue arms and grey legs. For Light infantry
Full light grey body. For Heavy infantry.
Special units (commanders Marines etc.) Will most likely have body armour. Bley if they have body armour, dark blue if not and also bley legs. If you want an example of the troops see this: http://www.mocpages.com/moc.php/211381 (they have the older decals)