Green emerged as the color of protest in Iran. The pictures describe more than any words in this blog. (Note: Green is the signature color of Mir Hossain Mousavi, the main rival of President Ahmadinejad in the Iranian elections.)
We may want to consider why is the color green so important in the Muslim world. In short, it was supposedly the Prophet’s favorite color. He is said to have worn a green cloak and turban, and his writings are full of references to the color. For example, a passage from the Qur’an describes paradise as a place where people "will wear green garments of fine silk.”
Green is also a symbol of nature and life—especially potent in the dry desert of many Middle Eastern countries. Of note, green is either the only color or one of the primary colors of the flags of Pakistan, Iran, Saudi Arabia, and the Palestinian group Hamas.