[Ultraviolet]

Originally Posted by RogerBW

I don't believe I've ever used it; it feels as though it would be difficult to make consistently interesting, though I suppose in a large urban environment you could have quite a few people who make the error.

It's notable that this is one-way: "someone else is often mistaken for you" might cause its own set of problems for an adventurer.

You mean like:
Whaddaya mean 'where's my cut?'. I gave it to you yesterday, down at the pub. You we're kind of confused, you were with some other frieds I don't know, and it's the only time I ever say you wearing a sweater vest.