How to create a duplicate and change a prefab

I have a car prefab and I want to duplicate it and change the color of the material but whenever I do it changes the other cars color as well. How can I duplicate the car prefab and change only it’s color?

Thanks.

The problem is that even if you duplicate the car prefab, both cars are using the one material, so any changes to that material will apply to both cars. You will want to make a material for each car prefab if you want to do this.