diff --git a/src/libs/utils/detailsbutton.cpp b/src/libs/utils/detailsbutton.cpp
index d5ab48238f8..32182d8ecf4 100644
--- a/src/libs/utils/detailsbutton.cpp
+++ b/src/libs/utils/detailsbutton.cpp
@@ -5,6 +5,7 @@
 
 #include <utils/hostosinfo.h>
 #include <utils/icon.h>
+#include <utils/stylehelper.h>
 
 #include <QGraphicsOpacityEffect>
 #include <QGuiApplication>
@@ -81,6 +82,14 @@ QSize DetailsButton::sizeHint() const
                  spacing + fontMetrics().height() + spacing);
 }
 
+QColor DetailsButton::outlineColor()
+{
+    return HostOsInfo::isMacHost()
+            ? QGuiApplication::palette().color(QPalette::Mid)
+            : StyleHelper::mergedColors(creatorTheme()->color(Theme::TextColorNormal),
+                                        creatorTheme()->color(Theme::BackgroundColorNormal), 15);
+}
+
 void DetailsButton::paintEvent(QPaintEvent *e)
 {
     Q_UNUSED(e)
@@ -93,11 +102,8 @@ void DetailsButton::paintEvent(QPaintEvent *e)
         p.restore();
     }
 
-    if (!creatorTheme()->flag(Theme::FlatProjectsMode)) {
-        const QColor outlineColor = palette().color(HostOsInfo::isMacHost() ? QPalette::Mid
-                                                                            : QPalette::Midlight);
-        qDrawPlainRect(&p, rect(), outlineColor);
-    }
+    if (!creatorTheme()->flag(Theme::FlatProjectsMode))
+        qDrawPlainRect(&p, rect(), outlineColor());
 
     const QRect textRect(spacing + 3, 0, width(), height());
     p.drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, text());
diff --git a/src/libs/utils/detailsbutton.h b/src/libs/utils/detailsbutton.h
index 8895418f805..844c9e13c20 100644
--- a/src/libs/utils/detailsbutton.h
+++ b/src/libs/utils/detailsbutton.h
@@ -49,6 +49,7 @@ class QTCREATOR_UTILS_EXPORT DetailsButton : public ExpandButton
 public:
     DetailsButton(QWidget *parent = nullptr);
     QSize sizeHint() const override;
+    static QColor outlineColor();
 
 private:
     void paintEvent(QPaintEvent *e) override;
diff --git a/src/libs/utils/detailswidget.cpp b/src/libs/utils/detailswidget.cpp
index e1ad8c19489..6b60bac0d87 100644
--- a/src/libs/utils/detailswidget.cpp
+++ b/src/libs/utils/detailswidget.cpp
@@ -227,11 +227,8 @@ void DetailsWidget::paintEvent(QPaintEvent *paintEvent)
                   : palette().color(QPalette::Window);
         p.fillRect(rect(), bgColor);
     }
-    if (!creatorTheme()->flag(Theme::FlatProjectsMode)) {
-        const QColor outlineColor = palette().color(HostOsInfo::isMacHost() ? QPalette::Mid
-                                                                            : QPalette::Midlight);
-        qDrawPlainRect(&p, rect(), outlineColor);
-    }
+    if (!creatorTheme()->flag(Theme::FlatProjectsMode))
+        qDrawPlainRect(&p, rect(), DetailsButton::outlineColor());
 }
 
 void DetailsWidget::enterEvent(QEnterEvent *event)