This is not against the law, is it?

[ILoveNiceGunas]

If you show a particular, expensive designer dress to a very good seamsperson and ask her to do her very best to replicate it......

It wouldn't be sold in a shop, only one would be made, for me. I'm just wondering.

Yes. Technically, though action is unlikely.

But you could be inspired by a piece for something with a similar theme.

Thank, I might say ''like this but do the collar in a lighter shade''. For example.