Survey Time!

Joe and I are looking to buy a new couch (from Ikea 'cause it's fairly cheap and we already know the kids are going to destroy it in a couple of years anyway) We're thinking of getting a sofa bed (more places to store people). The survey is the cover! Should we buy the red machine washable cover? Or the super dark navy dry clean only? Or the dark chocolate brown dry clean? Any will work in our living room. What do you guys think?