We’ve been seeing a lot of black used as an accent color for the past year. We use a black satin ribbon for our Garbo wedding invitation.
Something to consider, though, if you are thinking about using a black border framing your wedding invitation: black bordered cards have a rather grim use historically. Called “mourning paper” or mourning stationery, black bordered cards have been used for hundreds of years by widows and widowers.
I became really familiar with mourning stationery when I sold and catalogued rare books and manuscripts. If one was trying to date a letter signed by a famous 19th century writer (Yeats, Twain or Dickens for example) and it was written on a black bordered card, you knew a close family member or spouse, had died in the past year.
We’ve seen a few wedding invitation designs with black borders, and have to figure the designer doesn’t know much about stationery history. Black borders are intimately associated with the recent death of a spouse.