Kiwix for Android night mode allows to invert colors on articles. This is done with Javascript during the loading of an article. This feature works well with all versions of Android prior to 4.4 KitKat. With Android 4.4 KitKat nothing happens (the problem is probably the same with Android 5.0 Lillipop). This bug was original reported here. You can find a small ZIM file to play with here.

Kiwix is a Wikipedia offline reader for Wikipedia. Step in the development!