I think people give different definition to the word darkskinned.
Some people, especially black people, think darkskinned means a black person with a deep chocolate complexion ranging from Kelly Rowland to Alek Wek.
But a lot of non black people consider someone to be "dark" when you're brown, no matter what shade of chocolate.
As does Mac Cosmetics, with theor fair-medium-dark labels for maKe up lol.

Their dark foundation is a dark caramel shade.