[tshering]

Originally Posted by freekobo

Do you think it would be possible to have this activate only when reading a book, like keep the home screen, other apps and sleepcover non-inverted?

I don't think this is possible with the current night mode hack. It is somehow OT, but if you like you can do this.

Spoiler:

You can use .kobo/kepub/kepub-book.css to get something similar to the night mode. I use a file wob.css

html {
    color: white;
    background-color: black;
}
.KBHighlighting{
    color: black; 
    background-color: white;
}

.KBSearchResult {
    color: black; 
    background-color: white;
 }

With Kobo Launcher I start one of two scripts to activate or deactivate the white on black mode:

#!/bin/sh
cp /mnt/onboard/wob.css /mnt/onboard/.kobo/kepub/kepub-book.css

#!/bin/sh
rm /mnt/onboard/.kobo/kepub/kepub-book.css

The text of kepub/epub.kepub books will be displayed white on black. Everything else remains as it was.
Note that this does not work for epub.

You can find Kobo launcher here, and information to kepub-book.css here.