Parameters with Mouse Events?

I haven't used parameters much in the past, so I tried using them in this script to make it easier on myself. I thought the code would work fine at first, but when I ran it in play solo, there were no errors until I tried hovering over or clicking on one of the textbuttons. The output read "Players.Player1.PlayerGui.Control:18: attempt to index local 'button' (a number value)" when I tried to click on one of the buttons. I'm not sure if I'm using parameters right, but I thought I was. What am I doing wrong and is there anything I could improve upon? Any help will be appreciated.

wait(1)
game.StarterGui:SetCoreGuiEnabled("All", false)
player = game.Players.LocalPlayer
interface = player.PlayerGui.Interface
menu = interface.Menu
choices = interface.Choices
indoors = menu.Indoors
outdoors = menu.Outdoors
vehicle = menu.Vehicle

function hovering(button)
	if button.TextColor3 == Color3(165/255,165/255,165/255) then
		button.TextColor3 = Color3.new(200/255,200/255,200/255)
	end
end

function removing(button)
	if button.TextColor3 == Color3(200/255,200/255,200/255) then
		button.TextColor3 = Color3.new(165/255,165/255,165/255)
	end
end

function clicking(button)
	if button.TextColor3 ~= Color3(240/255,240/255,240/255) then
		indoors.TextColor3 = Color3.new(165/255,165/255,165/255)
		outdoors.TextColor3 = Color3.new(165/255,165/255,165/255)
		vehicle.TextColor3 = Color3.new(165/255,165/255,165/255)
		button.TextColor3 = Color3.new(240/255,240/255,240/255)
	end
end

indoors.MouseEnter:connect(hovering)
outdoors.MouseEnter:connect(hovering)
vehicle.MouseEnter:connect(hovering)
indoors.MouseLeave:connect(removing)
outdoors.MouseLeave:connect(removing)
vehicle.MouseLeave:connect(removing)
indoors.MouseButton1Down:connect(clicking)
outdoors.MouseButton1Down:connect(clicking)
vehicle.MouseButton1Down:connect(clicking)

The parameter refers to the mouse location, not the button. You may have to write the hovering and removing functions for each individual button event, as of yet I can't see any way that you could do besides that, but there probably is. Also, I don't think you have to add the color value division, and you still add .new to Color3 in the if statement.

--Example
outdoors.MouseEnter:connect(function()
	if outdoors.TextColor3 == Color3.new(200,200,200) then
	outdoors.TextColor3 == Color3.new(165,165,165)
end)