Is your feature request related to a problem?
It is a cosmetic problem, poor legibility (black on navy blue) of the buttons while using the light mode on the Modern template.

Describe the solution you'd like
A seperate CSS class for the button text color, instead of inheriting it from the main template CSS

Describe alternatives you've considered
I set a custom CSS override for now as a workaround

:root { --color-accent: #aaa; }