Do you mean a wall color? How about a shade lighter than the green of your toss pillow?

I have almost the same color couch and I painted my walls Sherwin Williams Antique White. In my home it's almost a very light yellow.

I would suggest one of the new 2016 white colors. I have a creamy yellow on my walls accented with red accessories and a cream colored sofa and it is beautiful.

I found the paint at HD, but took it to SW and they duplicated it.