Why is the color sequence not working? The particle emitter color?

local d = true

script.Parent.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") then
		if (d) == true then
			d = false
			local hum = hit.Parent.Humanoid
			hum.Health = hum.Health-20
			script.Parent.BrickColor = BrickColor.new("Medium stone grey")
			script.Parent:WaitForChild("ParticleEmitter").Color = ColorSequence.new{Color3.fromRGB(162,163,165)}
			script.Parent.Material = Enum.Material.Plastic
			wait(3)
			script.Parent.BrickColor = BrickColor.new("Persimmon")
			script.Parent:WaitForChild("ParticleEmitter").Color = ColorSequence.new(Color3.fromRGB(255,89,89))
			script.Parent.Material = Enum.Material.Neon
			d = true
		end
	end
end)