Those wheels need to be stripped with Acetone or Lacquer Thinner really good, Then if you want them to have some color that will last
get them powder coated. Who ever had it did a bad paint job on them.
Those look like aftermarket wheels, do they have Alcoa and SRT on them, if not they are not original and its going to be hard to figure out a color code, most auto body shop supply stores have a machine that they use to do a color match, they put it up to the wheel and it gives them a formula to mix the touch up paint, you might want to check into that. The original wheels were a silver not gray.