Description: When using LibreOffice on Linux Mint with a dark system theme, the “Thickness” dropdown in the sidebar (for lines and shapes) displays a white background, and all the line previews are white or barely visible. As a result, it's impossible to see the thickness options in the list — it looks blank. This issue only occurs with dark themes; using a light theme restores normal visibility. Steps to Reproduce: 1.Set Linux Mint (Cinnamon) to use a dark system theme. 2.Launch LibreOffice (Writer, Draw, or Impress). 3.Insert a shape or a line. 4.Open the Sidebar and select the Properties panel. 5.Click on the Thickness dropdown list under line properties. Actual Results: The dropdown has a white background. Line previews are rendered in white, making them invisible or nearly invisible against the background. The list appears empty, even though thickness options exist. Switching back to a light theme restores proper rendering. Expected Results: The “Thickness” dropdown should adapt properly to the dark theme. The background and line previews should have sufficient contrast, making all thickness options clearly visible. Reproducible: Always User Profile Reset: Yes Additional Info: Both LibreOffice and the system use dark appearance settings. Changing the icon set or LibreOffice color scheme does not fix the issue. Attaching a screenshot showing: A shape/line in the document. The open “Thickness” dropdown in the sidebar where previews are invisible on a white background. -------------------------------------------------------------------------- Version: 25.8.4.2 (X86_64) / LibreOffice Community Build ID: 580(Build:2) CPU threads: 16; OS: Linux 6.14; UI render: default; VCL: gtk3 Locale: el-GR (en_US.UTF-8); UI: en-US Ubuntu package version: 4:25.8.4~rc2-0ubuntu0.24.04.1~lo1 Calc: threaded
Created attachment 204810 [details] thickness drop down menu dark theme bug
I'm on OpenSUSE Tumbleweed, and am seeing the same bug. System theme is Nordic installed from the KDE Store theme downloader / installer. LO installed via OpenSUSE repos. Version: 25.8.3.2 (X86_64) / LibreOffice Community Build ID: 580(Build:2) CPU threads: 16; OS: Linux 6.18; UI render: default; VCL: kf6 (cairo+wayland) Locale: en-US (en_US.UTF-8); UI: en-US Calc: threaded
I can reproduce this on the Flatpak version, on Linux Mint with Cinnamon. Version: 25.8.4.2 (X86_64) / LibreOffice Community Build ID: 290daaa01b999472f0c7a3890eb6a550fd74c6df CPU threads: 4; OS: Linux 6.1; UI render: default; VCL: gtk3 Locale: es-PA (es_PA.UTF-8); UI: en-US Flatpak Calc: threaded