off-color
adj. 脸色不好的；颜色不佳的；下流的
同义词
参考例子
1.Children and teenagers are often misled by the misinformation conveyed by porno videos and off-color comics.
透过色情录影带和漫画所传播的性知识，往往会误导儿童和青少年。
2.Don't tell off-color jokes, reveal company secrets, gossip about co-workers or espouse your views on race, religion or the boss' personality.
不要讲低俗的笑话、泄露公司机密、讲同事的闲话或宣扬你关于种族、宗教的观点或你老板的人格。
3.There were, however, three rules guests had to follow: do not get drunk; do not swear or tell off-color jokes; sleep in separate bedrooms if an unmarried couple.
不过，有三条规矩客人必须遵守：不能醉酒；不能赌咒或开伤风败俗的玩笑；还没结婚的一对恋人要睡在不同的卧室。
英文解释
adj.
1.in violation of good taste even verging on the indecent
2.humorously vulgar
网络释义
Off- color
变色的，退色的，不标准的颜色; 变色的，退色的，不; 变色的退色的，不标准的颜色;
off-color material
变色材料;
Off-color humor
黄段子; 低俗笑话; 低级笑话; 黄色笑话;
off-color off-colour
颜色不佳的;