Racially, Assyrians -- like most Middle Eastern people -- are classified as Caucasian.
The Assyrians look quite similar to Southern Europeans (Greeks, Italians, Maltese, etc) and also Persian people. So they are Mediterranean.
Most Assyrians are fair-skinned. Though, there are lots that are olive and dark-skinned. Mediterranean
are found in Northern Iraq/Turkey.
Darker ones are found in the south of Iraq.