Aerial photo taken on June 30, 2018 shows a general view of Color Day Festival at Athens Olympic Stadium, Athens, Greece. (Xinhua/Lefteris Partsalis)
Greek famous pop singer Sakis Rouvas performs during Color Day Festival at Athens Olympic Stadium, Athens, Greece, June 30, 2018. (Xinhua/Lefteris Partsalis)
People play with colored flour during Color Day Festival at Athens Olympic Stadium, Athens, Greece, June 30, 2018. (Xinhua/Lefteris Partsalis)
Kids play with colored flour during Color Day Festival at Athens Olympic Stadium, Athens, Greece, June 30, 2018. (Xinhua/Lefteris Partsalis)
People play with colored flour during Color Day Festival at Athens Olympic Stadium, Athens, Greece, June 30, 2018. (Xinhua/Lefteris Partsalis)