Since the comforter reverses to lime green, you could go with lime green sheets. Or try to match the sheets with the blue of the comforter.

http://www.bedbathandbeyond.com/store/product/cozy-soft-reg-folklore-reversible-comforter-set/202738?categoryId=12498

I've had this comforter for awhile and have been using it with white sheets. But since I'm in college whites get dirty really quickly. I want to by a different color but I'm not sure what colors would go with it.

Thanks!