The people in north Africa back then and now are a mix of arabic and black african peoples. Now the desert seperates the south part of Africa from the north, and it's in sub-sahara africa where most people of darker skin live. So north Africa was pretty much part of the middle-east in terms of ethnicity, only Ethopia mostly had people of darker skin. (Back then Nubia if I'm not mistaken) So the people of ancient Egypt were mostly of arabic origin, but there was really a mix there.
As for Samson and the Hebrew people, there defintiely almost purely of middle-eastern descent. Abraham came from the land of Ur, which we believe is modern day Iran if I'm not mistaken again. The only way for black african people to have been part of the Israelites, is when they came up in the mix multitude that left with Israel during the Exodus. Yet then, they weren't of sub-saharan skin tone, but mostly mix. I seriously doubt Samson was black.
When speaking of ancient people, we commonly mix scripture with history. But lets separate them for a second.
The scripture tells us that the Hebrew people originated in and around what is now southern Israel and moved to Egypt at the behest of Jacob to escape famine. Meaning they originated in what is now Jordan and northern Saudi Arabia.
In the Bible there are many references to how the Hebrew/Israelites were often mistaken for or looked like Egyptians.
Acts 21:38 Paul mistaken for an Egyptian
Exodus 2:16-19 The priest of Midian speaking to his daughters about Moses watering their flock.
Matthew 2:13 Angel of the Lord tells Joseph to take Jesus and Mary and hide in Egypt.
So now to history. There is no record of who the Iraelites were until after the Exodus, but the wars fought along the way to Jerusalem are well documented.
Now when people think of a middle eastern man or woman they think of what they see today on tv. Light-brown skinned people with generally straight black hair. We agree that they were in Egypt and that they looked like Egyptians or middle easterners but how did the people of the area describe themselves
These are all pictures from the time of Seti I who is commonly recognized as the pharoah of the old testament. Now the Egyptians had a great ability to mix colors and could have easily described themselves as lighter skinned people if they so chose as evidenced by the the instances of both very dark and very light people throughout all their artwork. But when they describe themselves
the use that deep brown tone. Post Roman Empire saw a different mix of colors in the artwork.
Below is an ancient Sumerian depictian of a man and a bull
That was how the middle easterners described themselves.
Below you will find a picture of a modern Egyptian from the lower(northern) Egypt.
Below are pictures of modern Ethiopians and modern Egyptians that do not live near Cairo.
Think about it. It is commonly accepted that Black people are black because of a reaction to the Sun causing an increase in melanin. Well the middle east is among the hottest and most sun drenched place on earth. It would not be possible for a lighter skinned race to survive without relatively modern comforts or ways to protect themselves from the sun. They would burn up and likely die out from cancer in just a few generations.