Looks very close, and very nice. I'd say you just need to take some of the red tone out of the brown (so it doesn't look so close to Flecktarn brown) and some of the brightness out of the light green (so that it's not quite so close to the real stuff) - and maybe darken the darker green slightly.
Of course, all of this is based on what I see on screen - so it might be completely wrong. ;-)
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