How to make a color changing chat message from ChatMakeSystemMessage

Help and Feedback Scripting Support
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#1

I’ve made a localscript that receives a remote fire then uses the ChatMakeSystemMessage to make the announcement. I also make it so it has different color for each item rarities. Everything works except this one rarity named “Prominence”. Unlike any other rarities, I want this rarity’s color to change like rainbow. It does send the announcement but the color is just white and not changing. Any helps with this?

local remotes		= game:GetService("ReplicatedStorage"):WaitForChild("Remotes")
-- REMOTES
local crateRemote	= remotes:WaitForChild("CrateSpawned")

crateRemote.OnClientEvent:Connect(function(crateannouncement)
	
	local crateColor
	
	if crateannouncement == "Common" then
		crateColor = Color3.fromRGB(255,255,255)
	elseif crateannouncement == "Rare" then
		crateColor = Color3.fromRGB(4, 175, 236)
	elseif crateannouncement == "Legendary"  then
		crateColor = Color3.fromRGB(255, 176, 0)
	elseif crateannouncement == "Eccentric" then
		crateColor = Color3.fromRGB(255, 0, 0)
	elseif crateannouncement == "Sacred" then
		crateColor = Color3.fromRGB(0,255,0)
	elseif crateannouncement == "Mythical" then
		crateColor = Color3.fromRGB(255,0,191)
	elseif crateannouncement == "Prominence" then
		local rainbowloop = coroutine.wrap(function()
			while wait(.01) do
				local hue = tick() % 5 / 5
				local color = Color3.fromHSV(hue,1,1)
				crateColor = color
			end
		end)
	elseif crateannouncement == "Ancient" then
		crateColor = Color3.fromRGB(0, 0, 0)
	end
	
	
	local AcrateConfig = {
		Text	= "A "..crateannouncement.." crate has appeared.",
		Color	= crateColor,
		Font	= Enum.Font.SourceSansBold
	}
	
	local AncrateConfig = {
		Text	= "An "..crateannouncement.." crate has appeared.",
		Color	= crateColor,
		Font	= Enum.Font.SourceSansBold
	}
	
	if crateannouncement == "Legendary" then
		game.StarterGui:SetCore("ChatMakeSystemMessage", AcrateConfig)
	elseif crateannouncement == "Eccentric" then
		game.StarterGui:SetCore("ChatMakeSystemMessage", AncrateConfig)
	elseif crateannouncement == "Sacred" then
		game.StarterGui:SetCore("ChatMakeSystemMessage", AcrateConfig)
	elseif crateannouncement == "Mythical" then
		game.StarterGui:SetCore("ChatMakeSystemMessage", AcrateConfig)
	elseif crateannouncement == "Prominence" then
		game.StarterGui:SetCore("ChatMakeSystemMessage", AcrateConfig)	
	elseif crateannouncement == "Ancient" then
		game.StarterGui:SetCore("ChatMakeSystemMessage", AncrateConfig)
	end
end)

Result:
image