Curtain Color Advice?

Maybe a light cocoa?

I would choose the warmest shade of green in the chair's printed fabric for a valance and the sofa's light beige for curtains or vice versa. This way you carry both chair/sofa colors together in the room with lighter green walls. The wood is beautiful; bold and can stand alone.

Decided to go with a wide wall coverage of a darker green and add cream sheers as an accent instead of a valance so the stained glass would always be visible.
Thanks for the input!