A lighter shade of the sofa color would probably work.
I Have An Olive Green Sofa, Beige Walls. What Color Curtains Should I Buy?
Try a red, beige and green striped curtain
Sofa is gold/yello with flowers (deep red/gree/light borwn) wall are Coral in colour. I ahve to pick teh carpet or rug as well as the curtains. The sofa pillows are the same as the sofa fabric. I am getting so mipplows again. The Sosfa is traditional, please advise
A lighter shade of the sofa. Or if you have an accent color, like rust,or mauve, then that color.
I would go for olive green curtains and throw in some beige and olive green scatter cusions and accessories to tie it all in