ppmdraw ../data/9001_f_wm_s01_9001_en_1.ppm -colorname PapayaWhip

ee test.ppm

Try other colors like LavenderBlush, MistyRose, MidnightBlue, turquoise..

make all

or make pgmread

ppm2jpeg ../data/9001_f_wm_s01_9001_en_1.ppm 

ee color.jpeg 

x2pgm color.jpeg 

ee gray.pgm