Created attachment 154000 [details] How the buttons are as normal under Breeze Dark. In KDE, when using the Breeze theme, the LibreOffice Breeze style distinguishes between Undo and Redo buttons just fine. However, when using the Breeze Dark theme, the difference between the Undo/Redo buttons under the LibreOffice Breeze Dark style is barely perceptible, if at all.
Created attachment 154001 [details] How it looks when Undo button is clickable on Breeze Dark.
Created attachment 154002 [details] How it looks when Redo button is clickable on Breeze Dark.
Created attachment 154003 [details] How it looks when Undo button is clickable on Breeze.
Created attachment 154004 [details] How it looks when Redo button is clickable on Breeze.
That's true. Andreas, would you mind to make the lines a pixel thicker?
Dear Andreas Kainz, This bug has been in ASSIGNED status for more than 3 months without any activity. Resetting it to NEW. Please assign it back to yourself if you're still working on this.
Created attachment 159990 [details] Activated Undo in LibO and in KWriter As you can see in the image, LibreOffice use different transparency to distinguish active and disabled icons with KWrite. So, there's no issue with the icon theme itself.
(In reply to Heiko Tietze from comment #5) > That's true. Andreas, would you mind to make the lines a pixel thicker? I'm against this, Breeze should always follow 1px line (although it's not defined clearly in KDE HIG https://hig.kde.org/style/icons/monochrome/index.html)
Resolving as of Rizal's comment.