The colour orange was the most memorable symbol of the Orange Revolution, the chain of events that led to regime change in Ukraine at the end of 2004. That colour put Ukraine on the map for millions of people across the world.
In the aftermath of the Orange Revolution, there were many in the West and the countries of the former Soviet Union who predicted a domino-type wave of revolutions, that would bring democracy and liberalisation and reverse the authoritarianism that was widespread and consolidated in the region.
http://news.bbc.co.uk/2/hi/europe/8452559.stm
