Same thing happening on Gentoo Linux with version 2.7. Strange thing is, every now and then it doesn't happen, but I haven't been able to find any consistency in that so far.
Pull Request at https://github.com/highperformancecoder/scidavis/pull/155
This patch fixes the issue for me
error: ambiguous overload for ‘operator<<’
Just a quick update: Edit --> Preferences --> Colors and setting all entries to #232629 makes scidavis's colours exactly the same as the KDE Breeze Dark theme. The About window is still unreadable though, see screenshots. Might I suggest to add a checkbox to Edit --> Preferences --> Colors that disables/enables scidavis colour overrides? In case an user does not want to change the colour from the default provided by the theme. Because now I have to use the screen colourpicker to find the correct...
In version 2.3.0 on Gentoo Linux with the KDE Breeze Dark theme I'm still seeing some issues with the colours. So far I've noticed unreadable text (white on white) in the about window, file open/save window, and the settings window (see attached screenshots). Likely this is a simple case of the background colour being hardcoded, while the font colour is not.