Color on a black-and-white scan
Neural colorizers guess. They are often pretty, and they are often wrong about uniforms, flags, and skin. EnhancerPro’s tint follows brightness only: warmer midtones, cooler shadows, and a note on the result that says so.
If the file is already in color, the tool refuses. There is nothing to colorize.
Do not caption a tinted scan as colorized history. Caption it as a viewing tint.