A passport is an official travel document issued by a government that certifies a person's identity and nationality for international travel. A passport allows a person to enter and temporarily reside in a foreign country. Indian passports are issued by the Ministry of External Affairs.
Ordinary passports are issued to individuals who are citizens of India. These passports are issued to travel foreign countries for business ,holidays and visit purpose. Colour of Ordinary passport is Navy Blue .
Diplomatic passports are issued to people holding diplomatic status deputed by the Government of India . Colour of Diplomatic passport is deep maroon.
Official passports are issued to people who is high-ranking government officials, including IAS officers- for official travel abroad. Colour of Official passport is White .