// Assigns a white color to the material 
// attached to this mesh.

function OnMouseExit () {
    renderer.material.color = Color.white;
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void OnMouseExit() {
        renderer.material.color = Color.white;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def OnMouseExit():
        renderer.material.color = Color.white