No, not yellow. And thank goodness we don't all live in one. It was apparently not the greatest long-term workplace. He's more than happy to be off. It is cool to tour one, though. I never toured my brother's sub, but I went on a much older one (from WWII) in Baltimore, MD, which is now a ship museum. My parents, however, had the wonderful opportunity to ride in one of my brother's submarines from Oahu to I think Moloka'i in Hawaii. It was a special "parents" event. They loved it! I think the trip was only 2 hours long. They went only one way.