I'm afraid the rumours seem to be true.
Last week I've been in my local Hermès store (in France) to discuss my order for a Kelly in clemence in ebene. The SA said, that ebene is not available anymore (no matter what leather) and it's beeing replaced by café. He says, there is no difference in color though, just in name.
Trouble is, that I have seen café in this forum, not looking anything like ebene!
If you click onto Hermès Reference Library> Hermès Colors>Brown Color Family...Pics Only!>Page 4, you'll see a Kelly in Clemence Café (Post #57), followed by a Birkin in Clemence Café (Post #58).
Even bad lighting can't explain the total difference in color!
Quite difficult to say what is going on exactly....
If anyone sees a Kelly in togo or clemence, in ebene, please let me know!
As far as the Birkin goes, one can probably forget about it..