The robe, which is called an alb, is designed to cover the pastor’s body and clothing, taking the focus off of the pastor and reminding worshipers that he is a representative of God. The white robe also reminds us of the robe of righteousness that Christ has wrapped around us.
That colored cloth is called a stole. The stole is a historical symbol of the pastoral ministry. It is a reminder to the pastor and the congregation of the yoke of humble service that God has placed upon his shoulders.