Created attachment 161920 [details]
Screenshot of Start Center showing white text on light gray bg
With KDE5/QT5 VCL backend, Start Center has unreadable text (white on light gray background) when using Breeze Dark theme. (GTK3 and generic backends are fine.)
Steps to reproduce:
Start LO with SAL_USE_VCLPLUGIN=kde5 (or qt5), and observe the "sidebar" in Start Center.
Bibisected to this commit: https://cgit.freedesktop.org/libreoffice/core/commit/?id=8d11b953c0a69f4f5eb5ca42dec3812a62d0cd0f - CC'ing its author.
Confirming with build from current master
Startcenter on GTK is not ok too (see screenshot from Linux/GTK).
It is possible to change this, but prior to changing current design of startcenter should be confirmed as desired by UX team: Looking at GTK, dark mode do not seem to be implemented completely (e.g. Sifr icons for dark mode are nearly not visible on gray background). Issues like that could be resolved by a dark left sidebar. In this case white font color is required.
Created attachment 161963 [details]
Screenshot from Linux with GTK
Dark left sidebar would be nice with KDE and a dark theme, too.
Left sidebar in start center uses a predefined color, which can be changed via expert setting. See also bug 99116 and my approach in https://gerrit.libreoffice.org/c/core/+/89827 (don't remember but obviously I tried to solve more than just the color; maybe this
Color aColor = maFillColor;
mpItemAttrs->aFillColor = aColor.getBColor();
in ThumbnailView::ApplySettings() is enough.
If we use the system themed color for the sidebar this issue with bright font is invalid.
This is probably fixed by the patches for either bug 136555 or bug 134708, which should be available in 7.0.3 or already in a daily 7.1 build.
Yes, it is.