Why is Rs. 20 currency note in pink colour? There is an interesting story behind this. During the time of former prime minister, late Indira Gandhi, a meeting was held to decide on the colour for the new Rs. 20 note. For a long time, there was no clarity over the colour. Suddendly, Indira Gandhi's eyes fell on a pink cover in the pocket of then Maharashtra Chief Secretary, Kasjekar. She liked the colour and said that the same should be used for Rs. 20 note. The new note came into existence on June 1st, 1972. The cover was a wedding invitation.