[HELP] Light/Siren Colors

Server to server I’m always seeing people with all blue’s verses the traditional liberty lights, how are they doing this? I’ve seen a few threads but I’m not entirely sure how to do this for myself.

this should help you out https://www.gta5-mods.com/misc/custom-visuals-blue-light-mod-pack you will need openiv to swap lights out.

This’ll work server side or client? I’m looking for server side.

they replace files inside you ytd files on your vehicles and then you replace the carvarition files.