People from Italy have different skin types/complexions and this includes the Southern parts as well. They do not all have olive/tan skin because of the sun and dark hair.
I am Latino and it is like this with people from Mexico, Puerto Rico, Guatemala, Argentina, Brasil, and other Latin American countries. It is also this way with people from Spain.
With all due respect to your heritage....Spain and "Latin America" are poor examples for comparison.
For one, Latin America is obviously VERY racially mixed as Spanish, Indigenous people, and Africans have been mixing for going on 500 years now. I don't think bloodlines/ethnic groups/racial groups have ever mixed as much as what occurred in the countries you mentioned for those centuries. African Americans are very influential culturally on a global scale so people tend to forget that during the transatlantic slave trade 90% of the Africans ended up in "Latin America".
Second, Spain was controlled for centuries by northern Africans...and that forever changed the gene pool for large percentage of Spaniards.
In fact in Spain...and then later in her territories in Western Hemisphere.....there was so much "race" mixing that there developed stringent classifications for people based on what "race" your parents were (and their parents)...
in Latin America there are Casta paintings that illustrate these distinctions....and it was a social pecking order...
In short...there are different "looks" of people in Latin America and wider range for different reasons than for Italy.
