There are even so-called black Irish.(just to tease you.)

Yeahbut®, the "Black Irish", Dr. Bill, are so-called because they trace their ancestry back to the influx of Spanish Moors centuries ago, who were actually of black African descent, so there is a touch of African blood there. Eugene O'Neill's family were considered "Black Irish." Today the "Black Irish" have features strikingly darker than the usual fairer Celtic look, but that's about the only difference. Here's a picture of a young Eugene O'Neill to see an illustration:

http://www.irishfilm.net/Documentary/EO.html