Extract RAR file, install 'modsGreenEyes' folder and its contents in this path or similar:
"E:\SteamLibrary\SteamApps\common\The Witcher 3\Mods"
You may need to create the "Mods" folder.
To uninstall simply delete:
"modsGreenEyes" folder.
My first mod ever, so go easy on me.
Also taking suggestions for recoloring other things.
NMM is untested.