Hari is another name of Vishnu or God in Vaishnavism, Smarta or Advaitan Hinduism, and appears as the 650th name in the Vishnu sahasranama.
Sanskrit Hari is in origin a colour term for yellowish hues, including yellow, golden, yellowish-brown or reddish brown, fallow or khaki, pale yellow, greenish or green-yellow. It has important symbolism in the Rigveda and hence in Hinduism; in Rigvedic symbolism, it unites the colours of Soma, the Sun, and bay horses under a single term.
The word Hari is widely used in later Sanskrit and Prakrit literature, Hindu, Buddhist, Jain and Sikh religions. It appears as 650th name of Vishnu in the Vishnu sahasranama of the Mahabharata and hence rose to special importance in Hindu Vaishnavism.