[[File:Dark-theme-example-60.png|thumb|right|450px|Example Dark GTK3 Theme]]
It is possible to change the The Gramps theme on the Windows AIO(All in one) installation can be changed so long as the Gramps AIO is version 5.0.x or newer and uses Gtk 3.18 to 3.24 you can select a theme that MUST support those versions (also themes that are designed for a later version may not work). GTK Themes can be found in the '''[https://www.gnome-look.org/browse?cat=135&ord=latest GTK3/4 Themes]''' section on '''gnome-look.org''' that provide '''Eyecandy for your GTK Desktop'''.
The Gramps AIO version 4.2.6 and 5.0.0alpha3 uses Gtk 3.18, so a theme MUST be selected that supports that version (themes that are designed for a later version may not work).
One choice that provides a pretty good looking dark theme is https://www.gnome-look.org/p/1206053/ (404 The page you are looking for does not exist. ) the "OlliFri Gtk 3.18 Dark Blue Gradient".