The red lotus is the Avatar.
The white lotus is the Divine Consciousness.
In a general way the lotus is the flower of the Divine Wisdom, whatever its colour,
But red signifies the Avatar, the Divine incarnated in matter, and white signifies the Divine Consciousness manifested upon earth. -The Mother
Sri Aurobindo's Symbol
The descending triangle represents Sat-Chit-Ananda.
The ascending triangle represents the aspiring answer from matter under the form of life, light and love.
The junction of both, the central square is the perfect manifestation having at its centre the Avatar of the
Supreme - the lotus.
The water: inside the square -represents the multiplicity, the creation.