"Schindler's List" - Little Girl in the Red Coat

Perhaps the most moving image in Steven Spielberg's epic "Schindler's List" is the little girl in the red coat, one of only four color images in the three-hour black and white film. Our attention is drawn to the little blonde tot, overlooked by the German troops, who wanders alone amid the horror and panic. She is wearing a red coat which draws the viewer to her even when she is but one of a hundred people in a wide shot.

After watching the above video clip what is the significance/meaning of the girl in the red coat?