For decades this island has been bitterly divided into blue and green, the colors of its rival political parties. But that two-toned dichotomy has been upset in recent months by a sea of youths dressed in white.

Now known as the "White Shirt Army," the young people have become the biggest, most surprising social movement in Taiwan's recent history. Some experts believe their emergence represents a shift in the political thinking and direction of the island.

"We don't support any side or leader," said Liulin Wei, a lanky, soft-spoken 30-year-old who sparked the movement with a short online post four months ago. "We are for civil rights, common values, democracy. And we made it very simple to join. You just put on a white shirt."