I don't know if this has been posted before but here are the main character palette locations:
Note: This is for an unheaded rom
Crono- 240000 - 240016
Marle- 240018 - 24002E
Lucca- 240030 - 240046
Robo - 240048 - 24005E
Frog - 240060 - 240076
Ayla - 240078 - 24008E
Magus- 240090 -2400A6
Each character has 12 colours each.
