The most common turban colors worn by Sikhs are blue, white and black, although other colors are very popular as well. Blue and yellow are particularly prestigious and tend to be worn on religious events such as Vaisakhi. Meanings of the turbans are that the white turban means a saintly person leading an exemplary life, and an off-shade color of white means someone is learning in the Sikh religion. The blue turban signifies a mind as broad as the sky with no place for prejudice. The black turban serves as a reminder of the Jallianwala Bagh massacre in 1919, and represents humility. The Basanti or yellow turbans are associated with the revolutionary movement, Sardar Bhagat Singh also wore a yellow turban for this reason. Royal blue is usually worn by those who are learned in the Sikh religion and are patriotic about their traditions and culture. The colour green signifies farmers. The orange turban means courage and wisdom.