A pink lotus can be found in the middle of Aurobindo’s symbol.
Pink: Aurobindo (Indian avatar-philosopher) explained that pink is the colour of the psychic light, the soul’s vibration. The Mother (his evolutionary companion) confirmed that the soul found inside human beings on earth is an advanced type of soul that she and Aurobindo called the psychic being. This true soul can guide the human body in its purification and, ultimately, in the transformation of its three types of vibrations: mental, vital, physical.
Lotus: As for the lotus symbol, it represents the chakras, special revolving doors between the most material physical human body and the subtle worlds that can be found inside and outside it. The pink lotus symbolizes the door between the human body and its psychic being.