You can set up a "dark mode" for Hiarcs on PC by changing your Windows theme to a high contrast one.
Settings -> Personalization - > Themes - > Contrast themes -> use drop-down menu to select one of four themes (on Windows 11). Hiarcs will need to be restarted and in Hiarcs notation settings you need to 'reset colors' so that dark mode font colors kick in.
Dark mode on PC
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