how to have object keep random color in render code example

Example: set object to random color unity

[RequireComponent(typeof(Renderer))]
public class colorTint : MonoBehaviour
{
    public List<Color> TintColors;
    // Start is called before the first frame update
    void Start()
    {

            Color c = TintColors[Random.Range(0, TintColors.Count)];

            GetComponent<Renderer>().material.color = c;
    }