I found an article saying that there were 8 different hybrid Clematis in the Vancouver line created by Fred When, Sr.
Danielle is a cross between The President and Violet Charm and
should have purple blooms.
http://www.clearviewhort.com/c...
I'm no expert buy yours looks more like Fragrant Star in the same hybrid line. There is an image on this link...http://vancouversun.com/news/staff-blogs/clematis-back-in-the-spotlight