If they choose to be, have you heard of Melanesian people?
----
Black is a color. It is a phenotype. It historically has always meant, non-pale, non-white skinned.
White people called the aboriginals of Australia black.
The pale Asians called the indigenous Asian people of East Asia black.
Black does not = African descent.
African American = African descent.
You can be a Black person without being an African American.
So yeah, if a dark skinned Asian, like an Indian or a Cambodian, was like, I am Black, I would be cool.