try this: 
addEventHandler("onResourceStart",resourceRoot,function() 
    for i,v getElementsByType("vehicle")do 
        local player = getVehicleController(i) 
        if(player)then 
            local pedTeam = getPlayerTeam(player) 
            if(pedTeam)then 
                local r,g,b = getTeamColor(pedTeam) 
                setVehicleColor(i,r,g,b) 
            else 
                setVehicleColor(i,255,255,255) 
            end 
        else 
            setVehicleColor(i,255,255,255) 
        end 
    end 
end) 
  
addEventHandler("onVehicleStartEnter",root,function(player,_,jacked) 
    local r,g,b = getTeamColor(getPlayerTeam(player)) 
    setVehicleColor(source,r,g,b) 
end) 
addEventHandler("onVehicleExit",root,function() 
    setVehicleColor(source,255,255,255) 
end) 
 
And next time, please try making a script before coming here.