sombre

Adj.	1.	sombre - grave or even gloomy in character; "solemn and mournful music"; "a suit of somber black"; "a somber mood" Synonyms: somber
	2.	sombre - lacking brightness or color; dull; "drab faded curtains"; "sober Puritan gray"; "children in somber brown clothes" Synonyms: drab, somber, sober

colorless, colourless, drab, sober, somber