BetterChat

Try the attached version.

Code:

PLUGIN.Title       = "Name Colors"
PLUGIN.Description = "Change default chat name colors."
PLUGIN.Author      = "LaserHydra"
PLUGIN.Version     = V(1, 1, 2)
PLUGIN.ResourceId  = 979function PLUGIN:Init()
    command.AddChatCommand("colors", self.Plugin, "ColorList")
    if self.Config.PermissionsEnabled == "true" then
        if not permission.GroupExists("vip") then permission.CreateGroup("vip", "V.I.P.", 0) end
        permission.RegisterPermission("color_mod", self.Plugin)
        permission.RegisterPermission("color_owner", self.Plugin)
        permission.RegisterPermission("color_player", self.Plugin)
        permission.RegisterPermission("color_vip", self.Plugin)
        permission.GrantGroupPermission("admin", "color_owner", self.Plugin)
        permission.GrantGroupPermission("moderator", "color_mod", self.Plugin)
        permission.GrantGroupPermission("player", "color_player", self.Plugin)
        permission.GrantGroupPermission("vip", "color_vip", self.Plugin)
    end
    self:LoadDefaultConfig()
endfunction PLUGIN:LoadDefaultConfig()
    self.Config.AuthlevelColors = self.Config.AuthlevelColors or {}
    self.Config.AuthlevelColors.AuthLevel2 = self.Config.AuthlevelColors.AuthLevel2 or "orange"
    self.Config.AuthlevelColors.AuthLevel1 = self.Config.AuthlevelColors.AuthLevel1 or "yellow"
    self.Config.AuthlevelColors.AuthLevel0 = self.Config.AuthlevelColors.AuthLevel0 or "lime"
    self.Config.PermissionColors = self.Config.PermissionColors or {}
    self.Config.PermissionColors.player = self.Config.PermissionColors.player or "lime"
    self.Config.PermissionColors.moderator = self.Config.PermissionColors.moderator or "yellow"
    self.Config.PermissionColors.owner = self.Config.PermissionColors.owner or "orange"
    self.Config.PermissionColors.vip = self.Config.PermissionColors.vip or "aqua"
    self.Config.PermissionsEnabled = tostring(self.Config.PermissionsEnabled) or "false"
    self.Config.AuthlevelEnabled = nil -- Removed
    self.Config.ConsoleWarningDelaySeconds = nil -- Removed
    self:SaveConfig()
endfunction PLUGIN:ColorList(player)
    local colorList = { "aqua", "black", "blue", "brown", "darkblue", "green", "grey", "lightblue", "lime",
        "magenta", "maroon", "navy", "olive", "orange", "purple", "red", "silver", "teal", "white", "yellow"
    }
    local colors = ""
    for k, color in pairs(colorList) do
        colors = colors .. "\n" .. "<color=" .. color .. ">" .. string.upper(color) .. "</color>"
    end
    rust.SendChatMessage(player, "Available name colors:" .. colors)
endfunction PLUGIN:OnPlayerChat(arg)
    local player = arg.connection.player
    local userId = rust.UserIDFromPlayer(player)
    local message = arg:GetString(0, "text")    if self.Config.PermissionsEnabled == "true" then
        if permission.UserHasPermission(userId, "color_player") then
            rust.BroadcastChat("<color=" .. self.Config.PermissionColors.player .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        elseif permission.UserHasPermission(userId, "color_mod") then
            rust.BroadcastChat("<color=" .. self.Config.PermissionColors.moderator .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        elseif permission.UserHasPermission(userId, "color_owner") then
            rust.BroadcastChat("<color=" .. self.Config.PermissionColors.owner .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        elseif permission.UserHasPermission(userId, "color_vip") then
            rust.BroadcastChat("<color=" .. self.Config.PermissionColors.vip .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        end
    else
        if player.net.connection.authLevel == 0 then
            rust.BroadcastChat("<color=" .. self.Config.AuthlevelColors.AuthLevel0 .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        elseif player.net.connection.authLevel == 1 then
            rust.BroadcastChat("<color=" .. self.Config.AuthlevelColors.AuthLevel1 .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        elseif player.net.connection.authLevel == 2 then
            rust.BroadcastChat("<color=" .. self.Config.AuthlevelColors.AuthLevel2 .. ">" .. player.displayName .. "</color><color=white>", "</color>" .. message, userId)
        end
    end    return false
end

 

The error is with your timer, which should really be inside a function. If you take a look at the version I posted, I did away with some of the redundancy, removed some a lot of unneeded checks, and cleaned up a few portions related to the config and /colors command. Also keep in mind that the HasConfig isn't needed anymore at the top, as Oxide checks for LoadDefaultConfig() now instead. There's probably a bit more that could be done, but those are a good start and should hopefully point out a few ways to make it more dynamic.