The title says it all. I'm looking for a tool to manage a book project, but none of them like dark themes; they hardcode icons or use widget toolkits that nobody's ever heard of. Or just work in a way that clashes heavily with my mental organization.

More specifically, what I'm looking for is a writer's IDE; a piece of software that makes the process of writing more like the process of coding. There are several already, but none of them will work...

yWriter: very, *very* good on its own merits, but Windows-only and therefore hideously white. I could try WINE, but I'd have no guarantee that it would work with dark themes, and I'd rather have something native.

Scrivener: yes, I know I have a Mac on hand, but don't even mention it. $40 and no trial version.

Manuskript: getting closer. It uses QT5, but the Fusion style is hardcoded along with light UI colors. Gtk2 options are there, and are the only way to get a dark theme, but the icon colors and several other elements are hardcoded as black, making them invisible. Several other areas are also hardcoded as light blue, which makes it feel like it's falling apart.

Plume Creator: Fusion style is apparently hardcoded. It will use Breeze or qtCurve if the system setting is changed while it's running, but will only display Fusion on launch, even if I select GTK2 in its settings. It's the only one I've found that can use dark KDE colors at all, but only works on KDE and clashes with my mental organization.

Does anyone here know of any others gathering dust in a PPA or third-party repository somewhere?