mutool recolor

The recolor command changes the colorspaces used in a PDF file.

mutool recolor [options] file

The options are:

-c colorspace

The desired colorspace used in the output document: gray (default), rgb or cmyk.

-o output file

Use the specified filename for the output PDF file with altered colorspaces.

-r

Remove any output intents present in the input file.

file

Input file name. The input must be a PDF file.