I would add the blue counties of "North California" to "Silicon Valley" and call the resulting state North California. (It doesn't make sense to have the northern suburbs of San Francisco in another state).
The red counties of "North California" could be divided--those north of I-80 added to Jefferson, those south added to "Central California." Maybe "Sierra" would be a better name than Central California. Possibly add San Luis Obispo County to that state.
I would then rename "West California" to "South California" and "South California" to something else...maybe "Pacific" or "Pacifica." Maybe Orange County should be divided with the older suburbs near the L.A. County line going with what Draper calls West California, and the southern part going with what Draper calls South California.
Congress did a pretty good job on the whole of picking names of states when we had under 100 million people--in a nation of over 300 million people there should be people who can come up with some good names for the new states.
Is “egg sucking dog” state one of the names being considered?