Dark green cloth

Almost black.

Start with a black basecoat. Mix Dark Green into Black (start at about 1:2) and paint 80% of the cloth, leaving just the deepest recesses black. Mix more and more Dark Green into what you already have, and paint less and less of the model. Your palette should look like this.

The camera barely catches it on the mini, the effect is very subtle.

Small edge highlights using Heavy Green.

Superhighlight with a mix of Heavy Green and Dead Flesh.