How to deploy a custom-made color pallete across organization for all office apps

Question

I have created a custom color scheme for Office apps (Word, PowerPoint, Excel, etc.) based on our brand colors. Also, I have set our corporate fonts and paragraph options (line spacing, paragraph spacing, etc.).   Is it possible (and how) to set this color palette and our corporate fonts as default in office apps for all existing users in our organization and every future user that logs into our 365?   I need our custom color palette and font formatting set as a default on an organizational level (for all users) so that when they create new (blank) documents, this will be automatically set as the default.   The idea is also to make it future-proof so that if something needs to be changed (e.g. one color in the color palette), we can change it for all users at once.   Asset Library and templates are not exactly what I had in mind because users would then still have to choose custom templates from the gallery. I want to make this a default for all new blank documents. Any way to do this over the admin portal, PowerShell, or GPO?   Thanks, Marko