When running SMAPI 3.9.5 install on Linux.sh, and selecting light text on dark background, the following portion of the output is printed in black text:

Color scheme: light text on dark background
----------------------------------------------------------------------------

Removing SMAPI launcher...
Removing previous SMAPI files...
Adding SMAPI files...
Safely replacing game launcher...
Adding bundled mods...
   adding Save Backup...
   adding Error Handler...
   adding Console Commands...

My OS is Ubuntu 18.04 LTS and my terminal is Gnome Terminal

Hi! Do you mean this dark gray text color?

That's deliberate if so. That's DEBUG-level text, which should appear faded or 'grayed out' compared to the normal white INFO text.

If you're seeing fully black text so it's not readable, can you ping me on Discord so we can run some tests?