Lovely pictures
Trellum - I too love black flowers and would agree with you, somehow, photos just don't seem to do them justice, as they are not always able to capture the beautiful sheen and velvety texture of black flowers.
I would love to see gardens with black flowers intermingled with creams or vibrant purples, but unfortunately although there are quite a number of varieties to choose from, black flowers will remain fairly rare and quite difficult to get hold of, as they mostly snapped up by the florists.
As I mentioned, there are quite a few different plant varieties available, that have black flowers, some of which you may wish to add, as companions to your black tulips such as black pansies, hyacinths, hellebores or some of the following
Black Irises - which all come in varying shades of black
this one is called 'Draculas Kiss'
Black Calla or Arum Lily
The fragrant Black Rose ' Baccara '
or the beautiful black Asiatic Lily called 'Black Charm'
So as you can see, there is plenty of choice when it comes to black flowers, and although many of the above are not available as plants, you'll be pleased to know, that they can be grown from seed, most of which are available online.