Version info as follows: Version: 5.1.2.2.0+ Build ID: 1:5.1.2-3 CPU Threads: 4; OS Version: Linux 4.4; UI Render: default; Locale: en-US (en_US.UTF-8) This was tested on KDE 5.4 with the "Breeze Dark" theme. Specifically Debian amd64 unstable libreoffice package version 1:5.1.2-3. Problem: The toolbar for all LibreOffice applications appears to use a gradient background which ruins themes and makes the visibility of some icons very poor, especially with the Breeze icon theme. Best outcomes for me would be the removal of the gradient, or a user option to disable it. I googled around and found a number of other people having the same issue. The first link to reddit has a screenshot which looks almost identical to what my toolbar looks like, but it's worse because the icons on the left are completely invisible due to the width of the application. https://www.reddit.com/r/libreoffice/comments/3kv8m1/strange_toolbar_appearance_anyone_know_how_to_fix/ https://forum.antergos.com/topic/4006/libreoffice-writer-has-awful-gradient-in-toolbar-backgrounds https://ask.libreoffice.org/en/question/64180/disable-menutoolbar-gradients/ https://bbs.archlinux.org/viewtopic.php?id=206813 https://forum.openoffice.org/en/forum/viewtopic.php?f=16&t=27216
At least the Ask LibreOffice question isn’t related, and the Antergos and Arch threads give you the solution… *** This bug has been marked as a duplicate of bug 94172 ***
Suggested solution does not work for me, tried all possible settings, restarting libre office every time. Also: Adolfo's answer is a disgrace. Setting obscure variables in some file (the name of which might change at any point in the future creating problems later on, when the user forgot that he changed that one file for not remembered reasons). From what I see in those posts, it's only that one file, which is only accessible to root and that is under no circumstances a "solution".