public GameObject gameObject; //gameObject.GetComponent().material.color = new Color(r, g, b, a); //gameObject.GetComponent().material.color = new Color(255.0f, 255.0f, 255.0f, 0.0f); gameObject.GetComponent().material.color = new Color(255.0f, 255.0f, 255.0f, 100.0f);