Color (one of many but my favourite) used in Soviet Army can be described as dark green with yellow. I believe the closest html notation is #607930 🙂
Certainly not as versatile as coyote brown or smoke green, but a good base to put vegetation on uniform or paint vehicles.
Update
Advice from friend: RAL 6003 => #3d452e
Pingback: Minimalist backpack with simplified expanding zippered entrance | Ironbound Concepts