What surface traits do Dick and Perry share?

Dick and Perry are complete opposites, as far as their personalities they have nothing in common at all. The things they do have in common are trivial but also important. Both of these men have experienced an accident that has left them physically scarred; Dick's face is marred and Perry's leg injured to the point he finds it difficult to walk. They both have similar tatoos, they both prefer the color blue, they both dislike the treasure hunt, and they both served time in the penitentiary for murder.