Jotaro acquires his anime drip. =)

Download the .rar file.

Open .rar file.

Drag the "Jotaro Part 3 Recolor" folder into your ~mods folder (located in JUMP_FORCE/CONTENT/PAKS).

If you don't know how to access the game files, go to Steam, JUMP FORCE,  click properties, browse local files. Once there click "content", then open the "paks"  folder.  If you do not have a ~mods you can make one in your paks folder. =)