Off-color

Origin

Imagine a perfectly white garment, now stained with an almost imperceptible tint—it's 'off-color.' This literal sense of deviation from the true or expected hue gave birth to a potent metaphor in 19th-century America. Just as a fabric could be subtly flawed, a remark or a story could deviate from the pristine white of social propriety, acquiring an unseemly, slightly scandalous 'color.' The phrase became a clever, often humorous, euphemism for anything bordering on the indecent or vulgar, suggesting a playful, yet noticeable, stain on what was otherwise considered proper conversation. It allowed speakers to allude to the risqué without being overtly crude, much like a subtle tint that implies more than it shows.