[1.15.2] Item Display Name Colours

[Mantoes]

Currently I am using the lang file and the default Minecraft text formatting system to add colours to some of my item names. The only issue I have with this system, is that when an item is renamed on an anvil the player can remove the formatting characters around the item name. What would be the best way of preventing this from changing the colour? 

The two ideas I currently have are use my tooltip handling event to modify the name formatting of the item regardless of its changed name, or when the player edits the item name I add the correct formatting to the beginning and end of their custom name. 

I am wondering if there is a "more correct" or simpler method to deal with this.