What goes with green carpet

[Betty]

One of the houses we've made an offer on has green carpet. Darker then sea foam green and lighter then kelly green.

The walls are currently white.

Assuming I'm not going to be to afford to buy new carpet anytime soon and would like to paint the walls - what would look nice paint wise?

I'm a terrible decorator. I can tell when something looks good or bad to me - but try and come up with any sort of decorated room and I really struggle.

Would a mocha tannish color go well or would it make it feel like a tree with the brown and green?