Insufficient contrast on light background
Using the "light terminal" theme and default "Linux console" colours:
Note the header and selected PID line. Would you consider inverting colours or increasing brightness of the highlight (background colour) ?
Unfortunately due to a limitation in how background colors are handled with ncurses you can't have light background colors in a nicely portable way. It is possible, but usually involves hacks, as the bit for bright background is often misinterpreted as blinking foreground … ;-)
Wild. In the age of TrueColour-capable terminals... Made me check ncurses webpage:
The package was originated as pcurses, written by Pavel Curtis around 1982
No further questions.
@savchenko You should adjust the color palette of your terminal emulator. It isn't something we can adjust in htop's side. IMHO, we could have an alternative of using white text on a dark background for highlighted item, but the benefit of implementing that would be too small.