How can I use iTween to tween the color of a SpriteRenderer?

 using UnityEngine;
 using System.Collections;
 
 public class TweenSpriteRenderer : MonoBehaviour
 {
     public SpriteRenderer targetSpriteRenderer;
     public Color targetColor = Color.cyan;
     public float tweenDuration = 3;
 
 
     private void Start()
     {
         Hashtable tweenParams = new Hashtable();
         tweenParams.Add("from", targetSpriteRenderer.color);
         tweenParams.Add("to", targetColor);
         tweenParams.Add("time", tweenDuration);
         tweenParams.Add("onupdate", "OnColorUpdated");
 
         iTween.ValueTo(targetSpriteRenderer.gameObject, tweenParams);
     }
 
 
     private void OnColorUpdated(Color color)
     {
         targetSpriteRenderer.color = color;
     }
 }