You'd be hard pressed to do the much more "visible" four color woodland or the 4 color desert scheme let alonr the already tiny patterns of digital camo. Your best best would be to use one base color and stiple a second close color over it. The figures in this pic 
are probably showing up at 1/16 on your screen, Walk across the room and look at the screen, that's probably still larger than your figures are.
Copy and paste this in your photo editor and reduce the figures to the size you're dealing with...the lighter uniforms barely show a few darker spots while teh darker ones show a few tiniy lighter spots.