How to automatically invert font color in dark mode

davidhcje · 04-22-2024, 12:03 AM

When in dark mode, the font color of some epub books don't automatically get inverted. Colors like black and white are inverted, but some books use custom color like #211D1E for the entire books, and they don't get inverted. How to also invert those custom colors?
Any ideas? Thanks!

kovidgoyal · 04-22-2024, 01:42 AM

remove the colors from the book. Or use the override all book colors setting in the viewer preferences under colors which will do it for you automatically.

fogice · 04-22-2024, 08:57 AM

The easiest way to strip all the colors from the book is Convert Books > Look & Feel > Styling > Filter style information > Select which style information you want completely removed > Colors. You can also remove Fonts in the same spot, if you don't care about publisher fonts.

davidhcje · 04-26-2024, 10:38 AM

Thank you both for your guides. It works!

04-22-2024, 12:03 AM	#1
davidhcje Connoisseur Posts: 75 Karma: 10 Join Date: Mar 2021 Device: android phone	How to automatically invert font color in dark mode When in dark mode, the font color of some epub books don't automatically get inverted. Colors like black and white are inverted, but some books use custom color like #211D1E for the entire books, and they don't get inverted. How to also invert those custom colors? Any ideas? Thanks!

04-26-2024, 10:38 AM	#4
davidhcje Connoisseur Posts: 75 Karma: 10 Join Date: Mar 2021 Device: android phone	Thank you both for your guides. It works! Last edited by davidhcje; 04-26-2024 at 10:41 AM.

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04-22-2024, 01:42 AM	#2
kovidgoyal creator of calibre Posts: 43,892 Karma: 22666668 Join Date: Oct 2006 Location: Mumbai, India Device: Various	remove the colors from the book. Or use the override all book colors setting in the viewer preferences under colors which will do it for you automatically.

04-22-2024, 08:57 AM	#3
fogice Groupie Posts: 156 Karma: 12092 Join Date: May 2014 Device: Kobo Libra 2	The easiest way to strip all the colors from the book is Convert Books > Look & Feel > Styling > Filter style information > Select which style information you want completely removed > Colors. You can also remove Fonts in the same spot, if you don't care about publisher fonts.