I am wondering what would be an accurate word for the color of the prison uniform in the screenshot below, from a movie (Batman Begins).
The audio description of the color sounds to me like
Bruce and his cellmate, in worn petroblue uniforms, step outside into a grey grim yard.
Is petroblue a word? Google doesn't bear it out. If I misheard it, what could the color be? The audio excerpt can be found here (uploaded to Clyp, an easy audio sharing site).