These are the two schemes I've decided I like so far, currently I'm favouring the Catchan Green & White combo.
I've done up some tester models to see what the colours look like together, let me know what you think.
Catchan Green & White
Try and ignore the unfinished parts eh?
I like this one, I'm just concerned the green will coming out too dark once it's been 'army paintered'. The only model with army painter applied is the one on the very right, with the hand weapon & shield. You can see him best in the third picture.
I'd also use White as a primary colour like I've done with the Warriors above, I just didn't do it for the Miners - there weren't enough distinct parts on the clothes to use two separate colours and I didn't want the white parts to be too large. I find white an awkward colour to paint with consistency on the models, smaller stripes like on the warriors above are fine, I just wouldn't do a whole arm in white.