Description: Regardless if you set the LO theme to Dark or Light mode from the Options -> Appearance page, the LibreOffice UI will be displayed as the OS wants to. In this case I am using Kubuntu 25.04. Steps to Reproduce: 1. Set Kubuntu Global Theme to Breeze Dark 2. Open LibreOffice, go to Options -> Appearance and select Light theme. (Enable application theming does not matter) 3. Restart as requested Actual Results: LibreOffice is still displayed in Dark theme, although you selected Light Expected Results: The LibreOffice interface should be displayed in the Light theme and ignore the OS setting. Reproducible: Always User Profile Reset: No Additional Info: Version: 25.8.0.0.alpha1+ (X86_64) / LibreOffice Community Build ID: 6860cde78169af464a83ed6b9aa20b03e3a53bd4 CPU threads: 4; OS: Linux 6.14; UI render: default; VCL: gtk3 Locale: en-GB (en_GB.UTF-8); UI: en-US Calc: threaded
Can not confirm on Windows builds recent master against 25.8, LibreOffice Appearance theme 'Automatic' will follow os/DE as the Windows Settings Personalization color theme mode is set to Light or Dark mode. While LO in 'Light' or 'Dark' color Appearance theme will hold LO in that theme mode even as the Windows Settings Personalization color theme mode is set to Light/Dark. =-testing-= Version: 25.8.0.0.alpha1+ (X86_64) / LibreOffice Community Build ID: b852ed9fc8b43cdc335c14aeb71c581daa7d98a7 CPU threads: 28; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: en-US (en_US); UI: en-US Calc: CL threaded
Seems that this does not reproduce anymore in Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: a06689b1711e1f200afd4a4492341f337ba99082 CPU threads: 4; OS: Linux 6.14; UI render: default; VCL: gtk3 Locale: en-GB (en_GB.UTF-8); UI: en-US Calc: threaded Colors apply correctly.
My bad, it does not reproduce with Custom theme installed, but with the default Light theme it still reprouces.
I can confirm this behavior on Linux Mint Cinnamon. Even when manually selecting a 'Light' theme within LibreOffice settings (Tools > Options > LibreOffice > Application Colors and Personalization), the application continues to inherit the system-wide Dark mode. While I prefer a dark system theme, the current LibreOffice dark implementation has several UI scaling and visibility issues. Being unable to override the system theme to use the 'Light' interface is a significant regression in usability. 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
It seems we should set to NEW per the previous comment.