Custom Theme Applicator for SharePoint Online Modern Experience
In most cases you have to customize the modern experience based on your organization's branding or identity. Microsoft has given us a variety of options to do that; we have PowerShell cmdlets, CSOM and REST API. It seems most people prefer to just use PowerShell for this purpose as you get to see most blogs discussing how to create a custom theme using PowerShell. But to me, it's very tedious to work with PowerShell when you are testing different shades of color to use in your custom theme. I prefer an interface that allows me to click buttons to create or update, retrieve an existing theme and even remove it without working with a set of commands. It's a faster for me :). So to avoid the hassle of working with commands each time I want to test my theme, I decided to develop a SharePoint add-in using SharePoint theming REST API . You can download the app here in the app.publish folder. Once downloaded, upload the app to your App catalog and it's ready for use!