In breeze it should be black else in breeze-dark theme it should be white but it is always white.
This is actually intentional: - In the containment case things are hard-coded to white for now, which matches KDE 4 behavior (but see below). - In the widget case it does pick up the theme color. What's missing vs. KDE 4 is having the color be user-configurable, because we don't have color buttons in Qt Quick Controls (though I could hack one together with a button, a rectangle and a ColorDialog, and I might just do so). I'll close this as a dupe of bug 335070 though to bundle all the "what do we want to do with Folder text labels" together. *** This bug has been marked as a duplicate of bug 335070 ***