Is it possible to edit Grim Reapers outfit?

I hate sims 4 grim reapers clothes color so I decided to edit it a little bit but when I opened grim reapers set in S4S from CAS - Override - i.imgur.com/5TvPqvT.png and I moved it to mods folder but it was still same old color......... :/


So I was thinking that is it even possible to edit his clothes or do I have to edit them some other way than S4S