It depends on your definition of "dark-skinned." The bulk of Italian-Americans are on the darker end of the skin tone range. Their skin is usually tanned olive green. Many of them are Arab, Persian, or even North Indian in appearance. The current Italian Republic, on the other hand, is a heterogeneous country. It includes people of many colors and cultures, including white Europeans, so it's not surprising that its American descendants tend to reflect this diversity.
In fact, according to some studies, black people make up about 10% of Italian Americans. This number increases to 20% when you include Latinos of any race. Even among those who are not black or Latino, there is still a large variation in skin color. You can be brown or red-brown, but you will never be white. Sometimes this difference in coloring is obvious because people with white skin are called "Italiano" or "Wop" while those with dark skin are called "Blackie" or "Nigger."
In addition to racial differences, there are also cultural ones. For example, most Italian Americans have dark hair and eyes, so they typically spend more time grooming and making up than doing so for their lighter-skinned neighbors.
Overall, then, yes, the majority of Italian Americans are dark-skinned. They come in all colors, but they tend to be on the darker end of the spectrum.
This was not accurate, as there are dark-skinned Italians across Italy, not simply in the south, as well as light-skinned Italians throughout Italy. I say "very few" since over 80% of Italian immigrants came from Southern Italy (Sicily, Abruzzo, Calabria, Campania, Sardinia, Naples, etc.).
In fact, according to some sources, black people make up 0.5% of the population of Italy. Other sources say 1%. Either way, it is a very small number.
Most Italians with black skin belong to a minority within a minority. There are more Sicilians with black skin than there are blacks in Sicily. There are more Calabrians with black skin than there are blacks in Calabria. These individuals usually have black ancestry multiple generations back - probably mostly from African slaves or their descendants.
However, some Italians with black skin come from a single African ancestor many generations ago. They generally have white appearance because they get their color from their European ancestors. An example is the ebony Italian singer Al Bano and his brothers Nino, Giorgio, and Toni. All four musicians were famous for their participation in several successful songs between 1970 and 1990. However, only Nino and Giorgio had black skin while their siblings Toni and Enzo had white skin. The reason for this is that they came from a family with no black ancestors while their brother Nino did.
The skin tones of Italians range from pale to light brown to relatively dark brown. This skin tone may also include olive, golden, yellowish, beige, or cream undertones. The neutral green pigment that is barely visible on the skin's surface distinguishes Italian skin tones. Historically, the skin colors of Italians were generally not a concern for Europeans; they were primarily concerned with appearance of their inner organs.
Today, Italians are considered white according to the standards of most countries. However, due to the presence of darker skin tones in some regions of Italy, it is sometimes assumed that all Italians are as white as Germans or French people. This assumption is false because of the presence of darker skin tones in Calabria and Sicily.
There are two reasons why Italians have brown rather than black skin: first, they contain more melanin in their skin cells which gives them their natural color; second, they expose themselves to the sun less often so there is not much exposure time needed to get dark. Although blacks are very rare in Italy, many assume that all Italians are white because they don't see many blacks living there.
Italy has one of the highest percentages of whites in the world. In 2004, scientists at the Human Genome Project conducted tests on several groups of individuals from around the globe and concluded that no other group matches the average Italian in terms of genetic markers.
The fact that Italians in the north are lighter than those in the south is due, in part, to a greater Germanic influence in Northern Italy and a greater Arabic impact in Southern Italy. Furthermore, there is a climatic difference, which has an impact on skin tone. The sun's rays are closer to the ground in Northern Italy so you will find darker-skinned people there. In addition, the salt air from the sea can cause faces to rediscover their glow.
Among Italians of both northern and southern origins, the blond hair color is rare. There are several reasons for this: first of all, black hair is associated with positive qualities in Italian culture (bravery, strength, energy), so people tend to prefer colors that show off their hair rather than hide it. Then there's the fact that hair grows very fast in Italy, so people don't spend much time thinking about it.
However, it's not impossible to find blond Italians. The country has a large community of Swedish immigrants, many of whom come from the same region as the Italians who went there to work (the rural south). These days, some young Italians are also attracted to the look of natural blond hair.
In conclusion, although blond hair is uncommon in Italy, it isn't unique either. Since the 18th century, many Italians have been traveling to America and taking its beauty standards with them.