Finally, the white candle in the center represents Jesus Christ, the pure, sinless One who was sacrificed for us.

For you know that it was not with perishable things such as silver or gold that you were redeemed from the empty way of life handed down to you from your forefathers, but with the precious blood of Christ, a lamb without blemish or defect. He was chosen before the creation of the world, but was revealed in these last times for your sake.  (1 Peter 1:18-20)