Code review comment for lp://staging/~unity-2d-team/unity-2d/shortcut-hint-overlay

Why is it not part of the png for the border?

    Rectangle {
        id: totalArea
        color: Qt.lighter("#5e275023", -0.8)
        radius: 8
        smooth: true
        anchors.fill: parent
        anchors.margins: 10

Where is that color coming from?