How to make group name handler border change colors?

I have a nametag handler for a group but I want to make the border change colors how do I do that?

function Create(ClassName)
	return function(Properties)
		local Obj = Instance.new(ClassName)

		for i,v in pairs(Properties) do
			if type(i) == 'number' then
				v.Parent = Obj
			else
				Obj[i] = v
			end
		end

		return Obj
	end
end

function HandleCharacter(Player, Character)
	local FakeHead = Character:WaitForChild('Head'):clone()

	FakeHead.Name = 'FakeKestrelHead'
	FakeHead.Parent = Character
	FakeHead.face:Destroy()
	Character.Head.Transparency = 1

	Create'Weld'{
		Name = 'FakeHeadWeld';
		Parent = FakeHead;
		Part0 = Character.Head;
		Part1 = FakeHead;
	}
	Create'BillboardGui'{
		Name = 'Nametag';
		Parent = FakeHead;
		Size = UDim2.new(5, 0, 0.5, 0);
		StudsOffset = Vector3.new(0, 2, 0);
		-----
		Create'TextLabel'{
			Name = 'NameLabel';
			BackgroundTransparency = 1;
			Size = UDim2.new(1, 0, 1, 0);
			Font = 'SourceSans';
			Text = Character.Name .. ', ' .. Player:GetRoleInGroup(3034207);
			TextColor3 = Color3.new(1, 1, 1);
			TextScaled = true;
			TextStrokeTransparency = 0.5;
		};
	}
	
	FakeHead.BrickColor = Character.Head.BrickColor

	Character.Head.Changed:connect(function()
		Character.Head.Transparency = 1
		FakeHead.BrickColor = Character.Head.BrickColor
	end)
	Character.Head.Mesh.Changed:connect(function()
		FakeHead:WaitForChild('Mesh').MeshId = Character.Head:WaitForChild('Mesh').MeshId
	end)
end

function HandlePlayer(Player)
	if Player.Character then
		HandleCharacter(Player, Player.Character)
	end
	Player.CharacterAdded:connect(function(Character) HandleCharacter(Player, Character) end)
end

game.Players.PlayerAdded:connect(HandlePlayer)
for i,v in pairs(game.Players:GetPlayers()) do HandlePlayer(v) end

First, you would have to make sure the border is visible

button.BorderSizePixel = 1 --Can really change this to anything other than 0

Then apply the color.

button.BorderColor3 = Color3.new(1, 1, 1) --Anything here as well