Vairocana Buddha is sometimes called the primordial Buddha or supreme Buddha. He represents the wisdom of shunyata, "emptiness." He is considered a personification of the dharmakaya -- everything, unmanifested, free of characteristics and distinctions. When the Dhyani Buddhas are pictured together in a mandala, Vairocana is at the center.
Vairocana is white, representing all colors, and his his symbol is the Dharma wheel. His hand mudra represents the turning of the wheel. He is associated with the first skandha, form. Meditation on Vairocana vanquishes ignorance.