diff --git a/YACReader/bookmarks_dialog.cpp b/YACReader/bookmarks_dialog.cpp
index ec843e87..938f2f48 100644
--- a/YACReader/bookmarks_dialog.cpp
+++ b/YACReader/bookmarks_dialog.cpp
@@ -85,7 +85,7 @@ BookmarksDialog::BookmarksDialog(QWidget *parent)
 
     QPalette Pal(palette());
     // set black background
-    Pal.setColor(QPalette::Background, QColor("#454545"));
+    Pal.setColor(QPalette::Background, QColor(0x454545));
     this->setAutoFillBackground(true);
     this->setPalette(Pal);
 
diff --git a/YACReader/goto_flow_toolbar.cpp b/YACReader/goto_flow_toolbar.cpp
index cc7bec73..8fd8ea6e 100644
--- a/YACReader/goto_flow_toolbar.cpp
+++ b/YACReader/goto_flow_toolbar.cpp
@@ -93,7 +93,7 @@ GoToFlowToolBar::GoToFlowToolBar(QWidget *parent)
 void GoToFlowToolBar::paintEvent(QPaintEvent *)
 {
     QPainter painter(this);
-    painter.fillRect(0, 0, width(), height(), QColor("#99000000"));
+    painter.fillRect(0, 0, width(), height(), QColor(0x99000000));
 }
 
 void GoToFlowToolBar::setPage(int pageNumber)
diff --git a/YACReader/notifications_label_widget.cpp b/YACReader/notifications_label_widget.cpp
index 4e601d83..c6939493 100644
--- a/YACReader/notifications_label_widget.cpp
+++ b/YACReader/notifications_label_widget.cpp
@@ -47,7 +47,7 @@ void NotificationsLabelWidget::paintEvent(QPaintEvent *)
     QPainterPath path;
     path.addRoundedRect(QRectF(0, 0, width(), height()), 5.0, 5.0);
     painter.setPen(Qt::NoPen);
-    painter.fillPath(path, QColor("#BB000000"));
+    painter.fillPath(path, QColor(0xBB000000));
     painter.drawPath(path);
 }
 
diff --git a/YACReader/page_label_widget.cpp b/YACReader/page_label_widget.cpp
index bab7106e..fd30ba92 100644
--- a/YACReader/page_label_widget.cpp
+++ b/YACReader/page_label_widget.cpp
@@ -82,7 +82,7 @@ void PageLabelWidget::paintEvent(QPaintEvent *)
 {
     QPainter painter(this);
 
-    painter.fillRect(0, 0, width(), height(), QColor("#BB000000"));
+    painter.fillRect(0, 0, width(), height(), QColor(0xBB000000));
 }
 
 void PageLabelWidget::updatePosition()
diff --git a/YACReader/translator.cpp b/YACReader/translator.cpp
index 53217400..7551488d 100644
--- a/YACReader/translator.cpp
+++ b/YACReader/translator.cpp
@@ -51,7 +51,7 @@ YACReaderTranslator::YACReaderTranslator(Viewer *parent)
     this->setAutoFillBackground(true);
     this->setBackgroundRole(QPalette::Window);
     QPalette p(this->palette());
-    p.setColor(QPalette::Window, QColor("#404040"));
+    p.setColor(QPalette::Window, QColor(0x404040));
     this->setPalette(p);
 
     auto layout = new QVBoxLayout(this);
diff --git a/YACReader/width_slider.cpp b/YACReader/width_slider.cpp
index 9915742d..1b13f1f0 100644
--- a/YACReader/width_slider.cpp
+++ b/YACReader/width_slider.cpp
@@ -79,7 +79,7 @@ void YACReaderSlider::paintEvent(QPaintEvent *)
 {
     QPainter painter(this);
 
-    painter.fillRect(0, 0, width(), height(), QColor("#BB000000"));
+    painter.fillRect(0, 0, width(), height(), QColor(0xBB000000));
 }
 
 void YACReaderSlider::show()
diff --git a/shortcuts_management/actions_shortcuts_model.cpp b/shortcuts_management/actions_shortcuts_model.cpp
index 91447231..eb014268 100644
--- a/shortcuts_management/actions_shortcuts_model.cpp
+++ b/shortcuts_management/actions_shortcuts_model.cpp
@@ -59,7 +59,7 @@ QVariant ActionsShortcutsModel::data(const QModelIndex &index, int role) const
     }
 
     if (role == Qt::ForegroundRole && index.column() == KEYS && actions[index.row()]->shortcut().isEmpty())
-        return QBrush(QColor("#AAAAAA"));
+        return QBrush(QColor(0xAAAAAA));
 
     if (role != Qt::DisplayRole)
         return QVariant();