Looks like it could be Marmori.

Here is a link that might be useful: C. Marmori

Thanks, Maggie. It could very well be. Marmori is a variety I have in my garden, but it's young and hasn't bloomed much. This one seems to have darker pink toward the center. Dunno, but I like it a lot. Gary

Here is a bigger list of the bi-colors. You'll have to check them on CotW.

Here is a link that might be useful: Bi-color clematis

I like it a lot too, Gary.
Unfortunately, I don't have Marmori as yet so am only basing my guess on pics I have seen of it.
Hope you post a pic of your young Marmori when it flowers.

My first thought was Piilu, but when I checked my old photos, it is definitely Marmori.

Marie in ME