ngraham added a comment.
The straight lines in the system tray items from my screenshot are definitely 1px strokes. But all the curved lines look thicker by virtue of not being able to align to the pixel grid. And most monochrome widgets have thicker lines when added to a tall panel: F7813795: Screenshot_20191212_101746.png <https://phabricator.kde.org/F7813795> This may be a side effect of scaling up smaller icons, but I think the thicker strokes work well for a large panel. REPOSITORY R242 Plasma Framework (Library) REVISION DETAIL https://phabricator.kde.org/D25897 To: ndavis, #plasma, #vdg Cc: ngraham, kde-frameworks-devel, LeGast00n, GB_2, michaelh, bruns