guys, some character body parts has spaces, and my localscript doesnt work because of the spaces [?]

script.Parent.MouseButton1Click:Connect(function()
    game.Players.LocalPlayer.Character.["Right Arm"].BrickColor = BrickColor.new("Black")
    script.Parent.Parent.Parent.RIGHTARM.Text = "Black"
    script.Parent.Parent.Parent.RIGHTARM.BackgroundColor3 = Color3.fromRGB(27,42,53)
end)

a button that changes the right arm color, but it doesnt work because of the character, what is the problem?