Lucky Irish Flag! The national flag of Ireland, frequently referred to as Irish tricolor, is the ensign of the Republic of Ireland. Vertical stripes of White for lasting truce between Green, for Roman Catholics and Orange, for Irish Protestants, the flag pattern was adopted in 1922 to symbolize inclusion of the Irish Catholics and Irish Protestants. This design with horizontal white, green and orange stripes and 6 golden shamrocks is for fun and luck on St. Patrick’s Day.