Ireland's flag (also called the "Tricolor") is made of three equal-sized rectangles of orange, white, and green (a tricolor). The flag is twice as wide as it is tall. The green side is by the flagpole. This flag was first used in 1848.

The green colour on the flag represents the native people of Ireland (most of whom are Roman Catholic). The orange colour represents the British supporters of William of Orange who settled in Northern Ireland in the 17th century (most of whom are Protestant). The white in the centre of the flag represents peace between these two groups of people.