you can change the colour of the rims using a mod menu

PLEASE INSTALL THESE IF YOU DONT ALREADY HAVE THEM 
1) https://www.gta5-mods.com/misc/gta-5-gameconfig-300-cars

2) https://www.gta5-mods.com/tools/heapadjuster

3) https://www.gta5-mods.com/tools/packfile-limit-adjuster