In all actuality, I'm betting that the color scheme would not change for a deployment to Afghanistan. Western armed forces really haven't taken up changing their paint schemes to match their operating environment since Desert Storm, aside from maybe a few spec ops birds. A quick Google image search does not reveal any Griffons in anything other than the Canadian green-scheme or SAR colors. Then again, if you are really doing a "what-if," you could paint it any scheme you like.