Custom Chat - Full Code

function C3(r,g,b)
    return Color3.new(r/255,g/255,b/255)
end

local Settings = {
    ["GameName"] = "the game";
    ["ConsoleName"] = "SERVER";
    ["ConsoleColor"] = C3(0,192,128);
    ["WelcomeMessage"] = true;
    ["PlayerJoinMessage"] = true;
    ["PlayerLeaveMessage"] = true;
    ["RandomChatColor"] = true;
    ["DefaultChatColor"] = C3(192,192,192);
    ["ChatColors"] = {
        C3(192,192,192);
        C3(32,192,32);
        C3(16,192,192);
        C3(255,32,32);
        C3(64,64,255);
        C3(255,96,255);
        C3(255,16,255);
        C3(255,255,64);
    }
}

function addMessage(speaker,msg,chat,color)
    for i,v in pairs(chat:GetChildren()) do
        if v:IsA("Frame") and string.sub(v.Name,1,7) then
            v.ActualPosition.Value = v.ActualPosition.Value-32
            v:TweenPosition(UDim2.new(0,5,0,v.ActualPosition.Value),"Out","Sine",0.5,true)
            v.Name = "Message"..tostring(tonumber(string.sub(v.Name,8))+1)
            if v.Name == "Message6" then
                v:TweenPosition(UDim2.new(0,5,0,-62),"Out","Sine",0.5,true)
                game:GetService("Debris"):AddItem(v,0.5)
            end
        end
    end
    local ChatFrame = Instance.new("Frame",chat)
    ChatFrame.Name = "Message1"
    ChatFrame.BackgroundTransparency = 1
    ChatFrame.Position = UDim2.new(0,5,0,149)
    ChatFrame.Size = UDim2.new(0,0,0,32)
    local ActualPosition = Instance.new("IntValue",ChatFrame)
    ActualPosition.Name = "ActualPosition"
    ActualPosition.Value = 149
    local Name = Instance.new("TextLabel",ChatFrame)
    Name.Name = "Name"
    Name.BackgroundTransparency = 1
    Name.TextColor3 = color
    Name.TextStrokeTransparency = 0.5
    Name.Font = "SourceSans"
    Name.FontSize = "Size18"
    Name.Text = speaker
    Name.Size = UDim2.new(0,Name.TextBounds.X,0,Name.TextBounds.Y)
    Name.ZIndex = 2
    local Message = Instance.new("TextLabel",ChatFrame)
    Message.Name = "Message"
    Message.BackgroundTransparency = 1
    Message.TextColor3 = Color3.new(255,255,255)
    Message.Font = "SourceSansLight"
    Message.FontSize = "Size18"
    Message.TextXAlignment = "Left"
    Message.TextYAlignment = "Top"
    Message.TextWrapped = true
    Message.Text = msg
    Message.Size = UDim2.new(0,350,0,36)
    Message.Position = UDim2.new(0,Name.TextBounds.X+2,0,0)
    Message.ZIndex = 2
    local Shadow = Message:Clone()
    Shadow.Parent = Message
    Shadow.TextColor3 = Color3.new(0,0,0)
    Shadow.Position = UDim2.new(0,-1,0,1)
    Shadow.ZIndex = 1
end

game.Players.PlayerAdded:connect(function(plr)
    if Settings.RandomChatColor == true and #Settings.ChatColors > 0 then
        math.randomseed(os.time())
        plrColor = Settings.ChatColors[math.random(1,#Settings.ChatColors)]
    else
        plrColor = Settings.DefaultChatColor
    end
    local chatGUI = Instance.new("ScreenGui",plr:WaitForChild("PlayerGui"))
    chatGUI.Name = "ChatGUI"
    if Settings.WelcomeMessage == true then
        addMessage("["..Settings.ConsoleName.."]","Welcome to "..Settings.GameName.." "..plr.Name.."!",chatGUI,Settings.ConsoleColor)
    end
    if Settings.PlayerJoinMessage == true then
        for i,v in pairs(game.Players:GetChildren()) do
            if v ~= plr then
                addMessage("["..Settings.ConsoleName.."]",plr.Name.." has joined "..Settings.GameName.."!",v.PlayerGui.ChatGUI,Settings.ConsoleColor)
            end
        end
    end
    plr.Chatted:connect(function(msg)
        for i,v in pairs(game.Players:GetChildren()) do
            addMessage("["..plr.Name.."]",msg,v.PlayerGui.ChatGUI,plrColor)
        end
    end)
end)

game.Players.PlayerRemoving:connect(function(plr)
    if Settings.PlayerLeaveMessage == true then
        for i,v in pairs(game.Players:GetChildren()) do
            if v ~= plr then
                addMessage("["..Settings.ConsoleName.."]",plr.Name.." has left "..Settings.GameName.."!",v.PlayerGui.ChatGUI,Settings.ConsoleColor)
            end
        end
    end
end)