I think 2 colors for walls in one room is enough and would paint the wall the beige you have on the adjoining 2 walls leaving the gray wall as the focal point.

http://www.stevesblindsandwallpaper.com/wallpaper/productdetailpricing.aspx?pn=CX1211&ctg=1885&rkg_id=h-a7c5f2e064cae264e08d06eb027be207_t-1456200827&adpos=1o1&creative=48192656442&device=c&matchtype=&network=g&gclid=CjwKEAiAgKu2BRDu1OGw3-KXokwSJAB_Yy2QWK4nTKLJgbsugtPh5LH7c8hwwNPCvoZUnS_HtC0mDBoCj1Tw_wcB

Hi Prakash, Any more details? There are plenty of textured wallpapers available online... if you give us any specifications we can recommend you a few. Thanks! Luciana Sanchez www.lucianasanchez.com

You can get a custom wall art done , glass with bronze, glass painting, that wall should be a center of attraction, anyone walks. I have done this for a site, it works wonders, guest appreciate a unique feature. this can be done as DIY project on weekend also. these are some some real world executed ideas. cheers mate.