Where I live in the torturous mountains of the north of Portugal, people from villages all of five kilometres apart can look radically different. Our nearest village is your fairly standard Iberian phenotype - dark brown to black hair, and tanned looking. Across the valley is a village that took in Jews fleeing the inquisition - and they look Sephardic to this day. Ten kilometers north is a village still named in local dialect “Moorish village”, and lo and behold, the people there look Arabic.
So what was his phenotype? Only going to find that out by sequencing him. He probably had dark skin and hair, but he could have been blonde and pale.
Later edit: Apparently that map is based on this mid-19th century data sample: Percentages of blond hair in the Italian regions (including Corsica). Data collected by Ridolfo Livi on 1859-1863 lever classes ( "Renato Biasutti - Races and peoples of the Earth - UTET, 1941")
[1] https://old.reddit.com/r/MapPorn/comments/62yyuz/percentage_...
She was Slavic herself, and blonde.
The Mediterranean is a lot more complicated that people from afar tend to think.
Did his family include any of the many far off bloodlines bought into Italy via the Roman Empire creating far flung citizens?
As the peer comment states, there's a wealth of pigments in Italy, and that goes back before the High Middle Ages.
The earliest evidence of Italians' extraordinary genetic diversity dates back to the end of the last glacial period
https://www.unibo.it/en/news-and-events/notice-board/the-ear...
Edit: no, it wasn't a hyperbole , it was a metaphor