The National Flag of India is a horizontal rectangular tricolour of India saffron, white and India green; with the ', a 24-spoke wheel, in navy blue at its centre. It was adopted in its present form during a meeting of the Constituent Assembly held on 22 July 1947, and it became the official flag of the Dominion of India on 15 August 1947. The flag was subsequently retained as that of the Republic of India. In India, the term "tricolor" () almost always refers to the Indian national flag. The flag is based on the ' flag, a flag of the Indian National Congress designed by Pingali Venkayya.