Your in Zone 22. Keep that in mind when searching for plants.
Plants that I'm considering, if I can find them:
Jacobs Ladder (Polemonium)
Zone 1-11, 14-17. Another PNW and Mountain flower.
Heuchera (which comes in different leaf colors)
This is Coral Bells. They don't flower long or often but the foliage is pretty. There are more varieties of this plant. I've seen them used in desert gardenscapes as well.
Toad Lilly (Tricyrtus)
Zone 3-9, 14-17. Probably best in woodland areas of Northern CA and the PNW.