Dark mode.
Issue generated from Tuleap's migration script. Originally submitted by: ring user (username)
There should be a dark mode available as an alternative to the standard bright one.
On GNOME 3 there is a built-in dark mode, it's gray and fits the look of the rest of the system. I think there should be a black option in GNOME client too, simple making the background black (instead of grey) will do and will be appreciated by many, manipulating the font (change it to a darker color or to green for example) can be a nice option too.
On all the platforms the dark mode should ideally look like the one used in Wikipedia's Android application. Everything 100% black and the text grey (not white, but slightly darker). Optionally there can be an additional mode for people who prefer fancy looks and dislike black - grey backgrounds and more colors in the UI.
Why? Black color produces much less light that is bad for the eyes. On (AM)OLED screens (more and more popular) it additionally saves battery to great extents.