Created attachment 182004 [details] A lighter row of pixels below the tab bar bottom border and above Dolphin's darker view SUMMARY Tab bars have a row of pixels right below the bottom separator that's colored with the color of the tab bar background, rather than the below content background, which sort of creates the impression of a double-thick line in some cases. I suggest to just shave off this entire row of pixels completely rather than trying to figure out the content area's color. STEPS TO REPRODUCE 1. Open Konsole or Dolphin 2. Open some tabs 3. Zoom in OBSERVED RESULT Just below the tab bar bottom border, there seems to be another row of pixels that doesn't fit the color of the rest of the window below it. EXPECTED RESULT Tab bar bottom border and then the content directly SOFTWARE/OS VERSIONS KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0