California is known as a state with the most traffic in the country. You could not say that you have fully experienced the city experience unless you were on the road waiting for the signal to turn green. Because of this reason, traffic laws in California have implemented their own set of window tinting regulations.
Yes, tints with darker tones look cooler, but prioritizing the safety of you and others is a more significant accomplishment that you should look forward to. If you have no idea about the rules of the state of California in terms of window tinting, you can read this detailed infographic from Global Tint USA on what is prescribed by the state.