Why do Garmin data fields have weird green tint and not solid black in night mode? Some 3rd party data fields go full black and some not...

I am also not happy about it.
At least you can change the color of your profile and that color will be reflected on the home screen and those lines as well.
I have changed it to light blue and it's better compared to that green. Too bad that white is not allowed there, at least in dark mode.
menu -> activity profiles -> your profile -> 3 dots in top right corner -> color