Or maybe a bit bluer.

Blue colors are difficult to photograph accurately, so keep that in mind when you look at photos. I often use searches and books as well as the link below (use blue as the tepal color and leave the rest blank unless you have particular bloom times in mind) to find flowers to check out. You can also type in one word of a plant's name in the first line of the form to get more info on that particular plant.

I really like blue-purple shades. Here is a list of clematis that I grow with flowers in that mid blue-purple color range and that grow well for me. I'm not sure how they will grow in So Cal.; hopefully someone from your climate will weigh in.
HF Young (early large-flowered)
alpina 'Stolwijk Gold' (Atragene with gold foliage)
Arabella (Integrifolia - non-twining/non-clinging)
Betty Corning
BLUE ANGEL, AKA Blekitny Aniol)
macropetala 'Blue Bird', AKA 'Blue Bird' (Atragene)
Daniel Deronda (large-flowered_
durandii (Integrifolia - non-twining/non-clinging)
Emilia Plater
Pretty in Blue, AKA Zopre
Sizaia Ptitsa (Integrifolia - non-twining/non-clinging)

Some other blues to check out that have caught my eye, but I haven't bought (yet):
Ascotiensis
Pamela Jackman (Atragene)
Harlow Carr
Fujimusume
Juuli
Ken Donson
Perle d'Azure
Prince Charles
Rhapsody
Roguchi, AKA Rooguchi

Here is a link that might be useful: Clematis on the Web search page

I would be willing to bet that that photo is enhanced with Photoshop and that Clematis isn't that blue.

I would suggest calling that company and asking them which one it is. The photo should be one of their landscape jobs so they should know.

The Type III viticella group is known to do well in hot climates

Yes, I was hoping for a viticella. I like Roguchi, Daniel Deronda, and durandii very much. I have not seen Roguchi locally sold though, and there may be a good reason for that. I bought Betty Corning, but it looked gray in my garden- too much competition from all of the vivid colors- so I gave it to my mom.

Thank you for all of the suggestions. Now I have names to search, instead of mindlessly clicking through photos on HelpMeFind.

Renee