Hello, Since this is becoming a popular everywhere, a night mode for Okular would be nice. It is actually possible to achieve that for many PDFs going to Settings, accessibility, check Modify colors, choose Invert color. I feel this might be a popular setting that could go in the "Show" menu. It would not really be night mode, but "Invert colors" is probably clear enough. I thing going all the way to the accessibility setting (and discovering it) is less than ideal. I also think many people do not see it as an accessibility feature but as a preference. What do you think? (See also this Ask Ubuntu post, second result for "Okular night mode" in DuckDuckGo https://askubuntu.com/questions/472540/is-there-a-pdf-reader-allowing-me-to-change-background-color-of-arxiv-pdfs)
Hi, I thought this is a duplicate of some other bug, but don’t find it now. I already thought about this, see https://phabricator.kde.org/D21195 Maybe continuing work soon. A night mode would probably be Invert Luma instead of Invert Colors, to preserve colors. If you want to experiment, the color modification code is in ui/pageview.cpp:361 (// 4B.2. modify pixmap following accessibility settings).