ppmwheel
Generate a PPM image of a color wheel. More information: https://netpbm.sourceforge.net/doc/ppmwheel.html.
- Generate a color wheel of type
Ppmcirc:
ppmwheel diameter > path/to/output.ppm
- Generate a color wheel of type
Hue-value:
ppmwheel -huevalue diameter > path/to/output.ppm
- Generate a color wheel of type
Hue-saturation:
ppmwheel -huesaturation diameter > path/to/output.ppm