Amber & Green--
Yup, those are the patrol light colors that every security agency in the state must use. It was done In an effort to clarify and distinguish the types of warning lights utilized by different service vehicles. That way we aren't confused with construction and road site assistance who also use amber lighting.
In reference to security the statute states:
"Vehicles owned or leased by private security agencies may show or display green and amber lights, with either color being no greater than 50 percent of the lights displayed, while the security personnel are engaged in security duties on private or public property."
You can learn more about statute 316.2397 here