Jesus was not black African, he was what was considered to be white. The bible talks about Ethiopians being black and can not change their skin to be like white men (Israelite).
A description of a handsome Israelite person here.
Song of Solomon 5:11 New King James Version (NKJV)
11 His head
is like the finest gold;
His locks
are wavy,
And black as a raven.
An idealized Israelite had gold colored skin and black wavy hair. So lightly tanned.
Jeremiah 13:23
Can the Ethiopian change his skin or the leopard its spots?
Then may you also do good who are accustomed to do evil.
You can not change the color of your skin is used to teach you can not do any good when your an evil person. It is part of your nature to be of one color and do bad things. Once your doing evil there is no relief for the wicked, no rest except by being delivered by Christ who create in you a new nature which is good *( born again spirit still inhabits a body though which is dead because of sin)