Hello,
Welcome to our forum and thanks for contacting us with your question!
Although there's no built-in functionality to add shadow to solid gauge, it can be easily achieved by using SVG filters. You can play around with
dropShadow values until it suits your needs best.
Demo: https://jsfiddle.net/BlackLabel/b48jrm3x/
You might also find interest in this StackOverflow answer:
https://stackoverflow.com/a/47760126.
References:
https://css-tricks.com/adding-shadows-t ... g-filters/
https://developer.mozilla.org/en-US/doc ... ent/filter
https://developer.mozilla.org/en-US/doc ... DropShadow
Let me know if that was what you were looking for.
Best regards!