If not do a Google image search for 'american police officer' - almost every image has a different uniform colour, cut, insignia in it.
Dark blue, light blue, white, brown, black, grey, purple, yellow, green. It's every colour under the sun!
Two police officers:
https://static.trendscatchers.io/uploads/2019/01/bear34-uk.j...
https://writersforensicsblog.files.wordpress.com/2015/02/chi...
I think there's almost literally nothing consistent between these two uniforms (badge?)
> with a badge and utility belt
That's also what mall security guards wear in the US though.
I’ll give you the green. That is unusual. It might be fair to add green to the list for some state trooper uniforms and park police uniforms.
I apologize if you’ve spent significant time in the US. I’m assuming you haven’t if significant variation in police uniform seems like it would commonly come up. The colors I mentioned are typical for city, county and state police. There are some variations, e.g., I said dark which could be black or a dark blue. To most people, the difference does not cause them to read the situation differently. When I review the uniforms of the 40-50 policing bodies with which I’m most familiar, I don’t see much deviation.
Security guards do try to mimic police uniforms as much as they can get away with, and I think that is dangerous. At minimum they should be forbidden from wearing a badge that looks like a police badge, and they should not be allowed to wear a hat that looks like a police hat. A security guard with a baseball hat, no badge, and their firm printed on their uniform is not easily mistaken for police.
In many cities (including mine, which has a lot of private security) the word POLICE is written in all caps and large letters on the back and front of their shirts. It's hard to make the distinction until you see them once, then it's pretty clear