My dad is Sicilian, and he had a black beard mixed with red. So do I. My head hair is a very dark brown, nearly black, and that came from the Irish side of my family. Red-headed Sicilians are due to the Normans having ruled the island in the 11th-12 centuries. Scandinavians again.
My uncles have reddish-brown hair (kind of a brassy brown tone - not attractive imho, which is why I dye mine :D) and flaming red beards. They are of the Eye-rish variety.
I’m just over half German, and the rest is a mix of French, Irish, English and Scots. With a smidge of Native American.
I have brown hair. When my beard first came in, it was blonde, then turned bright orange. In my 30’s it turned brown, blond and red mixed. In my mid 40’s, it turned white.
When I said “pick a color, any color”, I should have set some limits.
Let’s see. I am pure Ashkenazy from Russia and Lithuania. My maternal grandfather had platinum blond hair and blue eyes. My paternal grandmother had red hair. My mother had dark brown hair and brown eyes, my father dark brown hair and blue eyes. My brother and sister had dark brown hair and brown eyes. I had dark brown, nearly black hair, but my beard, mostly black, had a fair amount of red and underarms even more. My eyes are blue (with a few flecks of green). My wife had light brown (or dark blond) hair and green eyes. Of my children, two have brown hair (one very dark) and one is blond. Two have blue eyes and one is brown (although there is green underlying with so many brown flecks that the overall impression is brown. An evolutionist’s nightmare, it seems to me.
Happens. I like to blame all red hair on Neaderthal genes.
My SO is Italian and he has dark brown hair, black eyebrows and lashes, and an auburn beard. Apparently red hair is quite common in some areas of Italy (Northern, especially) though he is the only one in the family with this coloring.
My mom is pure Dutch and my dad is pure Lithuanian, I know that my maternal grandfather never got this red beard thing, but both my father and I get the rusty beard hair + blond hair thing.