Dark theme on the phone must be darker

Last night while reading some content in bed on the Android app, I've noticed it was a bit uncomfortable because the dark theme still shows pages as a slightly brighter gray rather than actual black. Besides the power consumption aspect in OLED panels, that also reduces the content contrast, and at night creates that uncomfortable feeling.

Fixing is of course trivial, and would just require having the background as actual black, at least as a theme option.

Thanks!