People throw color dye powder at each other during the Holi "festival of colors" in India.
For more info about the Holi festival, read en.wikipedia.org/wiki/Holi.
Photos taken in India in 2013
The highlight if this trip was the Maha Kumba Mela Hindu Festival, the largest human gathering on earth, which happens once every 12 years.
Other regions visited include the springs of the Ganges river, Varanasi, the Konark sun temple.
See also my photos of Nepal that I took the same year.