Color of drawing room wall...  

I'm not much of an interior designer or something, but I guess a shade like cream or beige for the wall would go well with the red couch. I would also suggest white, but I don't know, I feel like walls in white get dirtier easily. Probably a light shade of gray would also do. If you want the couch to be the highlight of your room, pick colors that are more subdued so that the red color stands out. Just some of my suggestions.

I think becuase you have such a strong colour in your furniture,meybe you should go for a light colour on the walls. My floor tiles are marbled with red and all my accesories are cream, so maybe you should go for a mellow cream colour for your walls, or even white like my walls.