Not quite sure but I believe that option is no longer present in LR CC now, rather you have an option that is cross fade.
Thanks for getting back to me. I'm confused -- the linked page where it refers to the Fades Color Option says at the top left that the article applies to both Lightroom CC and 6 (I have 6). Screenshot attached.
Regardless, is there any way to get fade through black (or other color I guess) back? As a professional photographer that uses slideshows to give talks, it is, in my view, a more professional appearance. And it is nice to have options - not everyone likes to eat vanilla.
Or add it back in