The Collaborative International Dictionary of English v.0.48:
subfusc \sub*fusc"\, a. [L. subfuscus, suffuscus. See Sub-, and Fuscous.] 1. Same as subfuscous. [PJC] 2. Drab; dingy; dull. [Chiefty Brit.] [PJC]WordNet (r) 3.0 (2006):
subfusc adj 1: devoid of brightness or appeal; "a subfusc mining town"; "dark subfusc clothing"