All options can be abbreviated to their shortest unique prefix. You may use two hyphens instead of one to designate an option. You may use either white space or an equals sign between an option name and its value.
This program is part of Netpbm.
ppmmake produces a PPM image of the specified color, width, height, and maxval.
Specify the color (color) as described for the argument of the ppm_parsecolor() library routine.
ppmmake red 50 50
ppmmake rgb:ff/80/80 50 100 -maxval=5
This option did not exist before June 2002. Before, the maxval was always 255.