diff --git a/src/frontend/mainwindow.cpp b/src/frontend/mainwindow.cpp
index 7da38324..36ab97d0 100644
--- a/src/frontend/mainwindow.cpp
+++ b/src/frontend/mainwindow.cpp
@@ -162,7 +162,7 @@ void MainWindow::onTransChanged()
 void MainWindow::paintWithTrans()
 {
     QPalette pal = m_centralWidget->palette();
-    QColor color = m_centralWidget->palette().base().color();
+    QColor color = qApp->palette().base().color();
     color.setAlphaF(m_transparency);
     pal.setColor(QPalette::Base, color);
     m_centralWidget->setPalette(pal);
@@ -170,11 +170,11 @@ void MainWindow::paintWithTrans()
     QPalette tabPal = m_centralWidget->tabBar()->palette();
     tabPal.setColor(QPalette::Base, color);
 
-    QColor inactiveColor = pal.color(QPalette::Window);
+    QColor inactiveColor = qApp->palette().window().color();
     inactiveColor.setAlphaF(0.75 *m_transparency);
-    pal.setColor(QPalette::Window, inactiveColor);
+    tabPal.setColor(QPalette::Window, inactiveColor);
 
-    m_centralWidget->tabBar()->setPalette(pal);
+    m_centralWidget->tabBar()->setPalette(tabPal);
 }
 
 /**
diff --git a/src/frontend/tab-pages/tabpage.cpp b/src/frontend/tab-pages/tabpage.cpp
index f758cf50..e6523215 100644
--- a/src/frontend/tab-pages/tabpage.cpp
+++ b/src/frontend/tab-pages/tabpage.cpp
@@ -123,14 +123,14 @@ void TabPage::initUI()
 void TabPage::onPaletteChanged()
 {
     QPalette labPal = m_activatedNetLabel->palette();
-    QColor color = labPal.color(QPalette::PlaceholderText);
+    QColor color = qApp->palette().color(QPalette::PlaceholderText);
     labPal.setColor(QPalette::WindowText, color);
     m_activatedNetLabel->setPalette(labPal);
     m_inactivatedNetLabel->setPalette(labPal);
 
     if (m_deviceComboBox->view()) {
         QPalette view_pal = m_deviceComboBox->view()->palette();
-        QColor view_color = m_deviceComboBox->palette().color(QPalette::Active, QPalette::Button);
+        QColor view_color = qApp->palette().color(QPalette::Active, QPalette::Button);
         view_pal.setColor(QPalette::Base, view_color);
         m_deviceComboBox->setPalette(view_pal);
         m_deviceComboBox->view()->setPalette(view_pal);