A swarthy person has a dark face. He had a broad swarthy face. someone who is swarthy has dark skin (swarty (16-19 centuries), from swart (11-20 centuries), from sweart)
naturally having skin of a dark color; "a dark-skinned beauty"; "gold earrings gleamed against her dusky cheeks"; "a smile on his swarthy face"; "`swart' is archaic"