Sigil 0.9.14 had no inherent darkmode capabilities. The only way for BookView to have a black background in 0.9.14 is by using a custom .qss file in your Sigil preferences directory. The only way for Preview to have a black background in 0.9.14 is for the epub's own css to specify it, or by overriding the book's css with a custom user css file (also found in the Sigil preferences directory).
The colors from a newer version of Sigil might have become "stuck" if you downgraded from a newer version of Sigil, but you said you renamed the existing Sigil.ini file, so that rules out that possibility.
Last edited by DiapDealer; 06-18-2021 at 03:30 PM.
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