A colleague stumbled upon a quirk the other day while printing a renovation project. The views contained a Phase Filter overriding all existing construction to be gray lines (cut and projection) with a gray solid fill, but the lines were printing black.
The Colors setting under Appearance in the Print Setup dialogue box was set to Black Lines. This setting was overwriting the Phase Filter for the lines. Also, any Filled Region made with lines were also overridden by this setting.
Setting the Color setting in the Print Settings to Grayscale allowed the gray lines to print as desired. Selecting Color also works in this instance.