dirty; dingy; muddied; muddy
(of color) discolored by impurities; not bright and clear
"dirty" is often used in combination; "a dirty (or dingy) white"; "the muddied grey of the sea"; "muddy colors"; "dirty-green walls"; "dirty-blonde hair"
Nearest:
impure
WordNet Lexical Database
v3.0, © 2006 Princeton University