I know what you mean, I have dark brown hair and brown eyes and most of my ancestry has been traced back to Ireland and Germany and I'm even part Swedish... I must get my darker complection from my grandmother, she's what they would call Black Irish , an Irish person with a more Mediterranean look. I've seen pictures of her from when she was young and she looked a bit similar to Catherine Zeta-Jones who is Welsh/Irish. Supposedly that look comes from there being Iberian ancestry in the Irish and Welsh gene pools. There's some stuff about that on here    Celtic nations such as Scotland and Ireland have more in common with the Portuguese and Spanish than with the Celts of central Europe, according to a new academic report. ... Historians believed the Celts, originally Indo-European, invaded the Atlantic islands in a massive migration 2500 years ago. But using DNA samples from people living in Celtic nations and other parts of Europe, geneticists at the university have drawn new parallels. Dr Bradley said it was possible migrants moved from the Iberian peninsula to Ireland as far back as 6000 years ago up until 3000 years ago.