No tint is legal in California, even 100% clear, UNLESS IT COMES FROM THE FACTORY LIKE THAT. CHP and police normally don't hassle you if you don't go too dark. All tint is technically illegal.
I have lived in the Sac/Folsom/EDH area for 2 years. no tickets yet for window tint or front plate *knocks on wood*
"J, you're my favorite Pokemod" ~Revo1