dingy
adjective
thickly covered with ingrained dirt or soot
“a miner's begrimed face”
“dingy linen”
(of color) discolored by impurities; not bright and clear is often used in combination
“dirty”
“a dirty (or dingy) white”
causing dejection
“a blue day”
“the dark days of the war”
Source: WordNet 3.1, Princeton University
