What color should i paint my living room?

my living room and dining room are attached but I want to paint them different colors this is almost the color of my dining room a href="http://cdn.dickblick.com/items/006/67/swatches/00667_ChromeOxideOliveGreen-l.jpg" rel="nofollow"http://cdn.dickblick.com/items/006/67/sw…/a (the far left one) what color should the living room be if the colors are going to touch?