Hebrew – אד Ad – Mist or vapor. See Genesis 2:6
Wine
Wine is a symbol of the blood of the Christ, a symbol of that fire or that energy we need in order to sustain ourselves.
The Serpent and the Egg
“The serpent, separate or in combination with the circle, egg, or globe, has been a predominant symbol among many primitive nations. It prevailed in Egypt, Greece, and Assyria, and entered widely into the superstitions of the Celts, the Hindoos, and the Chinese.
The Three Magi
So, the three wise men who come to worship the child represent the colors of the great work.