Your armor is awesome, you've put a ton of work into it and is really shows...you should be proud. However, if she wants to use black and gold as her colors then there's no law against it, and I don't see a problem with it as I highly doubt she's using those colors because she saw you were using it. She's started out with alot of schemes, and asked members here what they thought and then refined it down based on the responses she received. Thats just a waste of emotional time to get annoyed over someone else's custom project. Now if she was doing the exact same thing, or it was pretty blatant that she stole your idea...yeah I'd probably be a little tweaked then.
-Edit Updated bad URL