How do I make a GUI button when toggled, it changes color?

So I am trying to redo this script for a gui, and I wanted to add this feature where if you toggle the button it changes color. In this scenario, I wanted to specifically do; when its off, its (30,30,31) and when its on, its (255,0,0). However, I came into contact with this problem that after turning it off, the color is then brighter than the original. Heres the script:

local P = script.Parent.Parent.Parent.Parent.Parent.Name
local HLoc = game.Workspace:FindFirstChild(P)
HighVis = script.Parent.Parent.Parent.HighVis
LowVis = script.Parent.Parent.Parent.LowVis

function onClick(mouse)
	local Helmet = HLoc:findFirstChild("Face")
	if Helmet ~= nil and HighVis.Value==false and LowVis.Value==false then
		Helmet.Light.Bright.Enabled = true
		Helmet.glass.Transparency = 0
		Helmet.Light2.light.Enabled = true
		script.Parent.BackgroundColor3 = Color3.new(255,0,0)
	HighVis.Value = true
	elseif Helmet ~= nil and HighVis.Value==true and LowVis.Value==false then
		Helmet.Light.Bright.Enabled = false
		Helmet.glass.Transparency = 1
		Helmet.Light2.light.Enabled = false
		script.Parent.BackgroundColor3 = Color3.new(10,10,11)
	HighVis.Value = false
	end
end

script.Parent.MouseButton1Down:connect(onClick)