In classical Arabic which is important as it's taught in schools Aswad and Asmar don't mean the same thing as you're trying to suggestVerily (Musa) alayhi Asalaam was Adaam shadeed Al Udmah jet black.
تفسير البيضاوي ج 3 ص 27
روي: انه علي السلام كان ادم شديد الادمة.
The majority of the scholars understood the meaning of Adam in the description of Musa alayhi As Salaam to mean Adam Shadeed
Al Udmah in other words ASWAD.
Bilal was described as Al Udmah while prophet Musa is described as Shadeed Udmah meaning extremely Dark, if Bilal is face of Black Muslims how is Musa described Darker than him but not Black?