English version

off-colour in Illness & disability topic

off-colourˌoff-ˈcolour British English, off-color American English adjective  1 RUDE/OBSCENEsexually offensive off-color jokes2 [not before noun] British EnglishMIILL slightly ill She’s been feeling a bit off-colour lately.
Examples from the Corpus
off-colourHow does a rat tell the experimenter that it has a headache or feels a bit off-colour?And you're looking a bit off-colour, to be honest.