I pushed the limits of what can be considered "navy" blue a bit by including the Giants, but it's also not royal blue. Id's argue that it's closer to navy than anything else. The jersey is a different matter. It's clearly not navy. None of this really matters, though. The point was that there are a bunch of teams with dark blue helmets. The league doesn't need another. Navy is this decade's black. It's the cool color for sports teams to use. No need to go down that road.