I'm going to ordersome Brickforge stuff this Christmas, so: I want to makethe Master Chief of Halo 4. Which colour of armour should I use? Dark green, olive green or sand green?

Well, this is really up to you. There isn't a right or wrong choice, as I've seen Master Chief figs in all those colors. Though sand green is going to retire soon, so it won't be there during Christmas I don't think. So between Olive green and Dark green, I say Dark Green.

Thanks, everybody told me about using dark green, so I think I'll use that

Olive Green is Sweet! but again, it depends on Your Master Chief that you're coping.
Dark Green Is very dark. I'd go with Olive or Sand. Olive is pretty amazing. I'll be doing a photo shot this weekend of my new olive green Chief ... I'll through in a compare the greens too. :o)

edit:
BF PA Greens

About it, I'm talking about Halo 4 Chief. Nick Brick uses Dark green, and with EclipseGrafx Space Assault legs it's impossible to find olive LEGO Figs!

Olive green is coming out in the LoTR's for sure, and I'm sure well see more in other places.

Here is a couple pictures showing all the different greens side by side. Perhaps it will help you decide!

viewtopic.php?f=13&t=6048

Credit to minifigCharmed for the pictures and topic.