jahumada55 @Matthias do you have versions of the note banners that work in Light Mode? The versions in the resources page only work well in Dark Mode: 
tr4jan jahumada55 Allow me a question of understanding, what exactly do you mean by „do not work well“? Attached how perfectly fine they are displayed in regular and dark mode (and the former looks like in your screenshot) ?
jahumada55 Yes, what I mean tr4jan is that in regular mode the banner looks "washed out", but the same banner looks perfectly fine in dark mode.
tr4jan jahumada55 Gotcha. Everything I can express is that the headers appear as designed (whether in normal or dark mode). The shades of grey are intentionally like this, not as you insinuated they would not work properly displayed in normal mode.
