public class ColorChanger : MonoBehaviour {

    private Renderer m_Renderer;
    private Color32[] colors;
    private Color32 g; /*The Green Color*/
    private Color32 r; /*The red color*/
    private Color32 y; /*The yellow color*/
 	private Color32 m_NormalColor; /*The color I should have by default*/

    void Start()
    {
        m_Renderer = GetComponent<Renderer>();
        g = new Color32(63, 207, 67, 0);
        y = new Color32(214, 219, 51, 0);
        r = new Color32(202, 39, 39, 0);
		colors = new Color32[] { g, y, r };
		m_NormalColor = colors[Random.Range(0, colors.Length)];
        GetComponent<Renderer>().material.color = m_NormalColor;
    }

    void Update()
    {
       	// TESTING ONLY, REMOVE FOR REAL BUILD
        if (Input.GetKeyDown(KeyCode.Space))
        {
            GetComponent<Renderer>().material.color = colors[Random.Range(0, colors.Length)];
        }
    }

    //Run your mouse over the GameObject to change the Renderer's material color to red
    void OnMouseOver()
    {
        Debug.Log("Mouse is over this object!", gameObject)
		m_Renderer.material.color = Color.white;
    }

    //Change the Material's Color back to white when the mouse exits the GameObject
    void OnMouseExit()
    {
		Debug.Log("Mouse is no longer over this object!", gameObject)
		m_Renderer.material.color = m_NormalColor;
    }
}