diff --git a/src/themes/chartthemegrayscale_p.h b/src/themes/chartthemegrayscale_p.h
index 9356c99..c2898a4 100644
--- a/src/themes/chartthemegrayscale_p.h
+++ b/src/themes/chartthemegrayscale_p.h
@@ -7,16 +7,16 @@ class ChartThemeGrayscale: public ChartTheme
 public:
     ChartThemeGrayscale():ChartTheme(QChart::ChartThemeGrayscale)
     {
-        m_seriesColors << QRgb(0xFF869299);
-        m_seriesColors << QRgb(0xFFA5BDCC);
-        m_seriesColors << QRgb(0xFFE8FFFC);
-        m_seriesColors << QRgb(0xFFCCC2C2);
+        m_seriesColors << QRgb(0xff869299);
+        m_seriesColors << QRgb(0xffa5bdcc);
+        m_seriesColors << QRgb(0xffe8fffc);
+        m_seriesColors << QRgb(0xffccc2c2);
 
         generateSeriesGradients();
 
         QLinearGradient backgroundGradient;
         backgroundGradient.setColorAt(0.0, QRgb(0xffffffff));
-        backgroundGradient.setColorAt(1.0, QRgb(0xffafafaf));
+        backgroundGradient.setColorAt(1.0, QRgb(0xffe0e3e5));
         backgroundGradient.setCoordinateMode(QGradient::ObjectBoundingMode);
         m_backgroundGradient = backgroundGradient;
     }
diff --git a/src/themes/chartthemeicy_p.h b/src/themes/chartthemeicy_p.h
index c59c11a..89cfa14 100644
--- a/src/themes/chartthemeicy_p.h
+++ b/src/themes/chartthemeicy_p.h
@@ -15,8 +15,8 @@ public:
         generateSeriesGradients();
 
         QLinearGradient backgroundGradient;
-        backgroundGradient.setColorAt(0.0, QRgb(0xffBDE3F2));
-        backgroundGradient.setColorAt(1.0, QRgb(0xffafafaf));
+        backgroundGradient.setColorAt(0.0, QRgb(0xffebebeb));
+        backgroundGradient.setColorAt(1.0, QRgb(0xfff8f9fb));
         backgroundGradient.setCoordinateMode(QGradient::ObjectBoundingMode);
         m_backgroundGradient = backgroundGradient;
     }
diff --git a/src/themes/chartthemescientific_p.h b/src/themes/chartthemescientific_p.h
index 8115ee5..ef35ddd 100644
--- a/src/themes/chartthemescientific_p.h
+++ b/src/themes/chartthemescientific_p.h
@@ -15,8 +15,8 @@ public:
         generateSeriesGradients();
 
         QLinearGradient backgroundGradient;
-        backgroundGradient.setColorAt(0.0, QRgb(0xffafafaf));
-        backgroundGradient.setColorAt(1.0, QRgb(0xffafafaf));
+        backgroundGradient.setColorAt(0.0, QRgb(0xfffffefc));
+        backgroundGradient.setColorAt(1.0, QRgb(0xfffffefc));
         backgroundGradient.setCoordinateMode(QGradient::ObjectBoundingMode);
         m_backgroundGradient = backgroundGradient;
     }
diff --git a/src/themes/chartthemevanilla_p.h b/src/themes/chartthemevanilla_p.h
index 24b96be..b5faa2f 100644
--- a/src/themes/chartthemevanilla_p.h
+++ b/src/themes/chartthemevanilla_p.h
@@ -7,17 +7,17 @@ class ChartThemeVanilla: public ChartTheme
 public:
     ChartThemeVanilla():ChartTheme(QChart::ChartThemeVanilla)
     {
-        m_seriesColors << QColor(217, 197, 116);
-        m_seriesColors << QColor(214, 168, 150);
-        m_seriesColors << QColor(160, 160, 113);
-        m_seriesColors << QColor(210, 210, 52);
-        m_seriesColors << QColor(136, 114, 58);
+        m_seriesColors << QRgb(0xffd9c574);
+        m_seriesColors << QRgb(0xd6a896);
+        m_seriesColors << QRgb(0xa0a071);
+        m_seriesColors << QRgb(0xd2d234);
+        m_seriesColors << QRgb(0x88723a);
 
         generateSeriesGradients();
 
         QLinearGradient backgroundGradient;
-        backgroundGradient.setColorAt(0.0, QRgb(0xff9d844d));
-        backgroundGradient.setColorAt(1.0, QRgb(0xffafafaf));
+        backgroundGradient.setColorAt(0.0, QRgb(0xfffbf9f1));
+        backgroundGradient.setColorAt(1.0, QRgb(0xfff5f0dc));
         backgroundGradient.setCoordinateMode(QGradient::ObjectBoundingMode);
         m_backgroundGradient = backgroundGradient;
     }