For a renter, decor in easily moved soft furnishings is easy. Try picking up some blue gray paint chips. Match one to the carpet and throw out the rest. Take that paint chip shopping for new bedding. Once you have the new bedding, you can choose a paint color from the colors in the bedding. Be sure to get written permission to paint before starting, including instructions on whether you will or will not have to change the paint to an off white when you leave or lose your deposit. Written, not oral, permission.