Your couch looks like it's somewhat darker than an eggshell color, not mossy green. The only mossy green I see is a throw or something on the second pillow to the left.

What you might do is go to a paint website and find the mossy green color. From there you should be able to find complimentary colors farther down the page. On Benjamin Moore's site, they show color pallets down on the lower left hand side of the page.

Green and teal as you have it in the room.