By Charles J. Sharp - Own work, from Sharp Photography, sharpphotography, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=39490480
Named for its roan colour (a reddish brown). They are somewhat similar in appearance to the sable antelopes and can be confused where their ranges overlap. Sable antelope males are notably darker, being brownish-black rather than dark brown.
Sources:
(*) https://www.inaturalist.org/taxa/42332-Hippotragus-equinus
(*) https://animalia.bio/roan-antelope