I created a custom button template that basically combines all of the tag control functionality of the pre-canned buttons, and adds a classic button appearance (Beveled edges that inset when the mouse is held-down).
It consists of a rectangle for the background and a label for the text.
My plan for styling the button is to use the style customizer to affect the root of the template, then add a script to apply the property changes to the background and text as-needed.
However, I hit a roadblock because I can’t get the style customizer to work on the template.
I have it set to change the background color based on the button’s tag value.
I added a script to print the background color when it changes, but it doesn’t print the color I assigned in the customizer, only the color in the template itself [The default rgba(255,255,255,0)].
Same problem as these folks: