New American Oxford Dictionary
off-color
off-col or (also off color ) ▶adjective 1 somewhat indecent or in poor taste: off-color jokes. 2 of the wrong or an inferior color: the new paint doesn't match, it's off-color. • (of a diamond ) neither white nor any definite color. 3 chiefly Brit. slightly unwell: I'm feeling a bit off-color.
American Oxford Thesaurus
off-color
off-color adjective off-color jokes: smutty, dirty, rude, crude, filthy, suggestive, indecent, indelicate, risqué, racy, bawdy, naughty, blue, vulgar, ribald, broad, salacious, coarse, obscene; informal raunchy; euphemistic adult.
Sanseido Wisdom Dictionary
off-color
ò ff-c ó lor ⦅英 ⦆-c ó lour 形容詞 1 卑猥 (ひわい )な, 無礼な .2 ⦅主に英 ⦆〖feel ~〗気分のすぐれない, 少し体調の悪い .3 ⦅英 報道 ⦆〈演技が 〉本調子でない, いつもより下手な .