Many flags of the Islamic world are <answer>green</answer>, as the color is considered sacred in Islam (see below). The flag of Hamas, as well as the flag of Iran, is <answer>green</answer>, symbolizing their Islamist ideology. The 1977 flag of Libya consisted of a simple <answer>green</answer> field with no other characteristics. It was the only national flag in the world with just one color and no design, insignia, or other details. Some countries used <answer>green</answer> in their flags to represent their country's lush vegetation, as in the flag of Jamaica, and hope in the future, as in the flags of Portugal and Nigeria. The <answer>green</answer> cedar of Lebanon tree on the Flag of Lebanon officially represents steadiness and tolerance.
Which color is considered sacred in Islam?
green