Either Sears or Huffy had road bikes with blue tires about 20+ years ago. They are hard to find, but if you keep your eyes open at thrift stores, you might be able to find a whole bike for a few bucks and just keep the tires.
Bike Nashbar had some pail gray colored tires a few years ago. I bought some; 120 psi 27"! The tires cracked, though and they were slippery when wet, so I was not happy with the quality.
Check out www.nashbar.com
They often have something special.
Walmart has some 27" tires with a reflector strip around it. It is a typical black/gumwall tire, but the reflector stripe adds something.