Stupid bill, criminals already paint their guns bright fluorescent colors and tips orange to throw off law enforcement. Something like this would just probably get more people killed... Soccer moms and idiot politicians...
That being said, the changes to the minimum requirement are "better" than the previously, "paint your entire gun a bright color" requirement. Colored strip of non removal tape on the stock, same for either grip or mags, and colored trigger guard (plus the US orange tip). But either way, it still sucks, especially considering how big the airsoft industry is in California.
Found this video to be very informative, though funny thing, its done by a Canadian airsofter.
Robo-Airsoft: Robo Real-Talk - Ep 1 - SB199 - Defend What You Love