Northern Ireland

This map may help clarify things, since Northern Ireland is a darker shade of green than the United Kingdom. Strangly, the Republic of Ireland is grey instead of green, even though the Irish are famous for being super into the color green. "Color" is spelled with five letters on electowiki.

Northern Ireland is north of Southern Ireland. The whole island appears to be called "Ireland", but weirdly, the Republic of Ireland doesn't include Northern Ireland. Instead, Northern Ireland is part of the United Kingdom, which is no longer part of the European Union. Their money has Charles III's head on it.