If I use LO 26.2 (nightly) with the gen or qt5 VCL's, Dark theme is mostly not respected - the UI is the same as in Light theme; except for the document background, which is indeed dark instead of light. Example build info: Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: e7201fd7c51743cb103bae82263d98830f5174cf CPU threads: 4; OS: Linux 6.12; UI render: default; VCL: qt5 (cairo+xcb) Locale: en-IL (en_IL); UI: en-US