It's a crying ass shame that my INSTAR paint range isn't available for sale just yet because I would have recommended our INSTAR Forest Green, Dirt Brown and Deep Red.
However, since I can't do that right now, I can recommend the colours that they are comparable to from
GW which is
Mournfang Brown (Deep Red),
Karak Stone (Dirt Brown) and
Ogryn Camo (Forest Green).
Those would be my choices.
The advantage with INSTAR is not just lower, more competitive prices, but much larger or smaller sizes than the standards available depending on the amounts you use.
Just search INSTAR on the forum to see what all the fuss is about or visit the website
INSTAR Paint