moon indicating dark mode
sun indicating light mode

When using Fish shell in dark mode, the color of a valid command is an unreadable blue. Themes do not change it, and terminal settings don’t either.

To change the color of the command:

set -U fish_color_command <color>

The color can be a word or hex value (such as red or ff0000).

To see other colors that can be changed:

set | grep fish_color