The Indigo revolt (or Nilbidroha) was a peasant movement and subsequent uprising of indigo farmers against the indigo planters that arose in Bengal in 1859.
Cause lead to revolt - Indigo planting in Bengal dated back to 1777. Louis Bonard was probably the first indigo planter. With expansion of British power in the Nawabate of Bengal, indigo planting became more and more commercially profitable because of the demand for blue dye in Europe. It was introduced in large parts of Burdwan, Bankura, Birbhum, North 24 Parganas, Jessore (present Bangladesh) etc. The indigo planters pursuaded the peasants to plant indigo instead of food crops. They provided loans, called dadon, at a very high interest. Once a farmer took such loans he remained in debt for whole of his life before passing it to his successors. The price paid by the planters was meagre, only 2.5% of the market price. The farmers could make no profit growing indigo. The farmers were totally unprotected from the indigo planters, who resorted to mortgages or destruction of their property if they were unwilling to obey them. Government rules favoured the planters. By an act in 1833, the planters were granted a free hand in oppression. Even the zamindars, means the landlords money lenders and other influential persons sided with the planters. Out of the severe oppression unleashed on them the farmers resorted to revolt.
The Bengali middle class supported the peasants wholeheartedly. Bengali intellectual Harish Chandra Mukherjee thoroughly described the plight of the poor peasants in his newspaper The Hindu Patriot. However the articles were overshadowed by Dinabandhu Mitra, who depicted the situation in his play Nil Darpan. The play created a huge controversy which was later banned by the East India Company to control the agitation among the Indians.