The play “Neel Darpan” is related to the Indigo Rebellion, also known as the Neel Rebellion. It addresses the issues and atrocities faced by the indigo farmers in Bengal during the colonial era, particularly the exploitation and abuse associated with the cultivation of indigo by British landlords. The play was written by Dinabandhu Mitra and was instrumental in drawing attention to the harsh conditions and injustice faced by the indigo cultivators, ultimately contributing to increased awareness and activism against the oppressive indigo planters.