I still include that under colonisation & migration. The moors migrated/ colonized Spain for many years. There were several crusades and then the Spaniards got their land back. (or rather it was the Catholic kingdoms, since the country of Spain didn't exist yet - they were the kingdoms of Castille, Leon, Granada, Navarre, etc).
As for those with Italian ancestry, they got the N African DNA probably due to migration, trade and maybe the Ottoman empire? (not sure exactly which countries comprised the Ottoman empire). Some southern Italians (and Greeks) have swarthy complexions and can pass as locals in N Africa or South Asia (especially if they have beards).
******
Btw, Boris Johnson's grandpa (or great grandpa?) was Turkish, with the surname of Kemal/ Kamal. Boris' great 2x grandma changed the surname of the child to her surname (Johnson) when she brought him to England to live & be educated. Mr. Kemal (the dad of the kid whose surname was changed to Johnson) was a critic of the govt and became an enemy of Attaturk ("founder" of Turkey) so the child was brought to the UK by his English grandma for his safety.
So BoJo is mixed race, though he looks very north European/ scandi. (He looks very much like his dad, as we would say "carbon copy")![]()