WordNet sense 1 (lighted by or as if by twilight):

twilight, twilit

WordNet sense 2 (devoid of or deficient in light or brightness; shadowed or black):

dark

WordNet sense 3 (naturally having skin of a dark color):

dark-skinned, swart

WordNet sense 4 (marked by dark or relatively dark pigmentation of hair or skin or eyes):

brunet, brunette