diff --git a/BMPEditor/CMakeLists.txt.user b/BMPEditor/CMakeLists.txt.user
index 158bea4..0648363 100644
--- a/BMPEditor/CMakeLists.txt.user
+++ b/BMPEditor/CMakeLists.txt.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 12.0.2, 2024-02-12T01:12:26. -->
+<!-- Written by QtCreator 12.0.2, 2024-02-12T09:42:06. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
diff --git a/BMPEditor/Editor/imagehistogramwidget.cpp b/BMPEditor/Editor/imagehistogramwidget.cpp
index 8b25585..e82e975 100644
--- a/BMPEditor/Editor/imagehistogramwidget.cpp
+++ b/BMPEditor/Editor/imagehistogramwidget.cpp
@@ -23,6 +23,9 @@ void ImageHistogramWidget::paintEvent(QPaintEvent *event) {
 
     QPainter painter(this);
     painter.setRenderHint(QPainter::Antialiasing, true);
+    painter.setPen(Qt::NoPen);
+    painter.setBrush(QColor(52, 52, 56));
+    painter.drawRect(0, 0, this->width(), this->height());
 
     // vykresli histogram RGB
     float barWidth = (float)width() / histogramRed.size();
@@ -31,7 +34,6 @@ void ImageHistogramWidget::paintEvent(QPaintEvent *event) {
     float x;
     float height;
 
-    painter.setPen(Qt::NoPen);
     painter.setBrush(Qt::red);
     for (size_t i = 0; i < histogramRed.size(); ++i) {
         x = (float)i * barWidth;