I WONDER - What Is The Difference Between Black And White Rhino?

The video explains that the difference between white and black rhinos is not their color, as both are grey. The name 'white rhino' comes from the Afrikaans word for 'wide', referring to its wide square upper lip. This was misunderstood as 'white', leading to the other species being called 'black rhino' to differentiate them.

What color are both the white and black rhinos?

Why was the black rhino named as such?