Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
off-colour is an adjective meaning "in violation of good taste even verging on the indecent". It carries one recorded sense.
in violation of good taste even verging on the indecent
“an indelicate remark”
“an off-color joke”
Definitions, synonyms and semantic relations for off-colour come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.