I was looking in the settings and I didn't see the option, but could you guys enable a night mode. I think it would be a good addition to people who like to read a night and would increase the user experience.
Night Mode
the app should have a night mode.
go into a chapter. then click once on the screen to open those 2 small bars and look for a 
moon.
i thinks thats how it worked
If u have latest app then night mode option is there in last tab where u earn spirit stones
I use the website.
Koatl The library is death for your eyes at night on the website.
7 months later
Every website should have a nightmode and for the changes in the backend go to https://netgears.support/netgear-genie-support
Koatl ummm, not sure if you still need this but to get to night mode you have to be reading a chapter (you can do this in pc) click on the gear in the chapter sidebar and you can change what the color of the background, from white, a tan-ish color and black.
Since this post is really old I'm not sure if you're still struggling to find the answer or not,
Hopes this helps.
Maybe u can use browser theme there theme make just like night mode