In a mausoleum in the Metairie Cemetery in New Orleans, the stained-glass window in the back of the tomb depicts an angel with red wings.  Angel’s are known as God’s messenger from the Hebrew root meaning send. 

This angel is thought to be a Seraphim.  Seraphim are one of nine orders or choirs of angels which are organized into three spheres or orders, with three choirs in each.  According to Christian tradition, the First Order, is made up of the Seraphim, Cherubim, and Thrones; the Middle or Second Order is made up of Dominions, Virtues, and Powers; and the Lowest or Third Order is made up of Principalities, Archangels and Angels. 

Seraphim are mentioned in Isaiah 6:2-3 (King James Version):  2) “Above it stood the Seraphim; each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly.”  3) “And on cried unto another, and said, Holy, holy, holy, is the Lord of hosts: The whole earth is full of His glory.”

According to tradition, the Seraphim have red wings because they are the closet to God.