NPS - Control Button Bar - Overlay Transparency

Feature description:

Using icon styles “With overlay” or “Primary color with overlay” creates an overlay for the button icons. The existing transparency slider controls the transparency of the icon on top of the overlay. (This is useful and I want it to stay.)

I am requesting an additional transparency slider for the overlay created by these two styles.

Problem solved:

Unable to match transparency of Control buttons to that of all other NPS elements.

Brought benefits:

Customization of button overlays

Consistency with other NPS elements

Other application solutions:

 

 

Additional description and context:

 
Pic 1: control button transparency affects icons (e.g. 1st is set to 100%) but not the overlay they are on. That’s perfectly fine and very useful.

My goal is to have the overlay of some/all of these Control buttons match that of the Bottom bar buttons. The bottom button overlays are lighter (since they’re set to 67% opacity).
 

Screenshots / Mockup: