If you exclude New York City and the San Francisco Bay Area then about the same as blue states. Even so I lived in the SF Bay Area for 3 years. We left there and moved to a red state in the Midwest for 10 years before moved back west to another red state. I am a software developer and I've earned more money in red states than in California. The cost of living is much lower in the red states. In fact, as a person who lived most of their life in So Cal (plus 3 years in the SF Bay area), everything is better in a red state.
I will say that up until the 80's California was a really great place to live. But because the left just cannot leave things alone they had to utterly destroy any joy of living on California. Taxes are way too high and you can't do anything any more without the state shutting you down or making it very difficult.
I'm glad I don't have to put up with that crap but I do miss the weather.