The
regional legend of this temple states that Vishnu assumed various colours during various eras according to the nature of the living beings and their behaviour. During
Satya Yuga, people were well-behaved (
satvaguna) and Vishnu was white (called
svetavarna) in colour. During
Treta Yuga, he assumed the colour of pavalam (
emerald) and hence came to be known as Pavalavannar or Pralavannar (in
Sanskrit). In the
Dvapara Yuga, he assumed green colour (
pachai in
Tamil). In the current
Kali Yuga, he assumed blue tint called
syamalavarna and it is believed that people will not be influenced by the form Vishnu appears. Vishnu is believed to have appeared for twin
Ashvini twins as Pavalavannar and hence retains the name in modern times. As per another legend,
Saraswati, the goddess of knowledge in Hinduism, wanted to stop the penance of her husband
Brahma. She sent an army of demons to attack him. Vishnu stood up to save his devotee Brahma and was smeared with blood red colour. He was called Pravalesa and Pavalvannan, the colour of emerald in
Tamil. There is another temple named Pachaivannan, which is located axially across the road and these two twin temples are mentioned together. ==History==