"This combination of photos shows, top row from left, Blue light projected during the opening ceremony of the ISU World Championships Speed Skating Sprint in the Netherlands, on Feb. 23, 2019, U.S. Navy Blue Angel flying over Sausalito, Calif., on  Oct. 10, 2019, Police firing blue-colored water at protestors in Hong Kong on Aug. 31, 2019, a tray of wild blueberries at the Coastal Blueberry Service in Union, Maine on Aug. 24, 2018, bottom row from left, actress-writer Tina Fey wearing a blue gown at the Oscars on Feb. 24, 2019, Swedish youth climate activist Greta Thunberg, wearing a blue sweatshirt, during a protest outside the White House in Washington on Sept. 13, 2019, H.E.R. performing under blue lights at the Coachella Music & Arts Festival in Indio, Calif. on April 14, 2019, Duke fans wearing blue wigs before an NCAA college basketball game against Florida State in Tallahassee, Fla., on Jan. 12, 2019 and ""Today"" show co-host Al Roker wearing blue eye glasses on the set in New York on April 5, 2019."
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