When one vehicle is towing another by means of a chain what does the chain need to have displayed o it?

When one vehicle is towing another by means of a chain what does the chain need to have displayed o it?
That's actually illegal in most states you need to get a tow truck or a car dolly but if you must use a chain I suggest painting the chain a bright color so if some thing happens and it's laying in the road other drivers can see it. I suggest white or yellow.