Your best choice would be a neutral color since your furniture is pink. A shade of gray would blend well, either dark or light. You could also go with a tan color, such as khaki shade.
You could obviously paint your living room walls pink, and then the furniture would naturally blend it. Some think of pink as a female color, however. If you're looking to paint your walls with another color, maybe red or orange might do. Make sure the color intensity is similar to that of pink, cause that can make a difference.
Decide what feel you are going for and what your accessories will match. A light shade of gray will give a more sophisticated room. A pale green will give a more casual look to the room. Stay away from other pastels. Use pillows that match the color scheme on the furniture.