diff --git a/src/agenda/agenda.cpp b/src/agenda/agenda.cpp
--- a/src/agenda/agenda.cpp
+++ b/src/agenda/agenda.cpp
@@ -1528,9 +1528,12 @@
     //    QPixmap bgImage(d->preferences()->agendaGridBackgroundImage());
     //    dbp.drawPixmap(0, 0, cw, ch, bgImage); FIXME
     //  }
-
-    dbp.fillRect(0, 0, cw, ch,
-                 d->preferences()->agendaGridBackgroundColor());
+    if (!d->preferences()->useSystemColor()) {
+        dbp.fillRect(0, 0, cw, ch,
+                    d->preferences()->agendaGridBackgroundColor());
+    } else {
+        dbp.fillRect(0, 0, cw, ch, palette().color(QPalette::Window));
+    }
 
     dbp.translate(-cx, -cy);
 
@@ -1544,7 +1547,12 @@
 
     // Highlight working hours
     if (d->mWorkingHoursEnable && d->mHolidayMask) {
-        const QColor workColor = d->preferences()->workingHoursColor();
+        QColor workColor; 
+        if (!d->preferences()->useSystemColor()) {
+            workColor = d->preferences()->workingHoursColor();
+        } else {
+            workColor = palette().color(QPalette::Base);
+        }
 
         QPoint pt1(cx, d->mWorkingHoursYTop);
         QPoint pt2(cx + cw, d->mWorkingHoursYBottom);
@@ -1596,7 +1604,19 @@
             if (busyDayMask[i]) {
                 const QPoint pt1(cx + d->mGridSpacingX *i, 0);
                 // const QPoint pt2(cx + mGridSpacingX * (i+1), ch);
-                QColor busyColor = d->preferences()->viewBgBusyColor();
+                QColor busyColor;
+                if (!d->preferences()->useSystemColor()) {
+                    busyColor = d->preferences()->viewBgBusyColor();
+                } else {
+                    busyColor = palette().color(QPalette::Window);
+                    if ((busyColor.blue() + busyColor.red() + busyColor.green()) > (256 / 2 * 3)) {
+                        // dark 
+                        busyColor.lighter(140);
+                    } else {
+                        // light 
+                        busyColor.darker(140);
+                    }
+                }
                 busyColor.setAlpha(EventViews::BUSY_BACKGROUND_ALPHA);
                 dbp.fillRect(pt1.x(), pt1.y(), d->mGridSpacingX, cy + ch, busyColor);
             }
@@ -1606,31 +1626,45 @@
     // draw selection
     if (d->mHasSelection && d->mAgendaView->dateRangeSelectionEnabled()) {
         QPoint pt, pt1;
+        QColor highlightColor;
+        if (!d->preferences()->useSystemColor()) {
+            highlightColor = d->preferences()->agendaGridHighlightColor();
+        } else {
+            highlightColor = palette().color(QPalette::Highlight);
+        }
 
         if (d->mSelectionEndCell.x() > d->mSelectionStartCell.x()) {   // multi day selection
             // draw start day
             pt = gridToContents(d->mSelectionStartCell);
             pt1 = gridToContents(QPoint(d->mSelectionStartCell.x() + 1, d->mRows + 1));
-            dbp.fillRect(QRect(pt, pt1), d->preferences()->agendaGridHighlightColor());
+            dbp.fillRect(QRect(pt, pt1), highlightColor);
             // draw all other days between the start day and the day of the selection end
             for (int c = d->mSelectionStartCell.x() + 1; c < d->mSelectionEndCell.x(); ++c) {
                 pt = gridToContents(QPoint(c, 0));
                 pt1 = gridToContents(QPoint(c + 1, d->mRows + 1));
-                dbp.fillRect(QRect(pt, pt1), d->preferences()->agendaGridHighlightColor());
+                dbp.fillRect(QRect(pt, pt1), highlightColor);
             }
             // draw end day
             pt = gridToContents(QPoint(d->mSelectionEndCell.x(), 0));
             pt1 = gridToContents(d->mSelectionEndCell + QPoint(1, 1));
-            dbp.fillRect(QRect(pt, pt1), d->preferences()->agendaGridHighlightColor());
+            dbp.fillRect(QRect(pt, pt1), highlightColor);
         } else { // single day selection
             pt = gridToContents(d->mSelectionStartCell);
             pt1 = gridToContents(d->mSelectionEndCell + QPoint(1, 1));
-            dbp.fillRect(QRect(pt, pt1), d->preferences()->agendaGridHighlightColor());
+            dbp.fillRect(QRect(pt, pt1), highlightColor);
         }
     }
 
-    QPen hourPen(d->preferences()->agendaGridBackgroundColor().darker(150));
-    QPen halfHourPen(d->preferences()->agendaGridBackgroundColor().darker(125));
+    QPen hourPen;
+    QPen halfHourPen;
+    
+    if (d->preferences()->useSystemColor()) {
+        hourPen = d->preferences()->agendaGridBackgroundColor().darker(150);
+        halfHourPen = d->preferences()->agendaGridBackgroundColor().darker(125);
+    } else {
+        hourPen = palette().color(QPalette::WindowText).darker(150);
+        halfHourPen = palette().color(QPalette::WindowText).darker(125);
+    }
     dbp.setPen(hourPen);
 
     // Draw vertical lines of grid, start with the last line not yet visible
diff --git a/src/eventviews.kcfg b/src/eventviews.kcfg
--- a/src/eventviews.kcfg
+++ b/src/eventviews.kcfg
@@ -374,6 +374,7 @@
 
 <!-- Colors and Fonts Page: Colors Tab -->
   <group name="Colors">
+
     <entry type="Color" key="Holiday Color">
       <label>Holiday color</label>
       <whatsthis>Select the holiday color here. The holiday color will be used for the holiday name in the month view and the holiday number in the date navigator.</whatsthis>
@@ -711,5 +712,11 @@
     <entry key="Month Holidays Background Image" type="String">
     </entry>
     <!-- END:   These entries are the same for the Month and month views, please keep them in sync -->
+    
+    <entry type="Bool" key="Use System Color">
+      <label>Use system color</label>
+      <whatsthis>Use system color. If enabled will ignore all other color settings</whatsthis>
+      <default>true</default>
+    </entry>
   </group>
 </kcfg>
diff --git a/src/month/monthgraphicsitems.cpp b/src/month/monthgraphicsitems.cpp
--- a/src/month/monthgraphicsitems.cpp
+++ b/src/month/monthgraphicsitems.cpp
@@ -63,7 +63,7 @@
         arrow.setPoint(2, -mWidth / 2, -mHeight / 2);
         arrow.setPoint(0, 0, mHeight / 2);
     }
-    QColor color(Qt::black);
+    QColor color(QPalette().color(QPalette::WindowText));
     color.setAlpha(155);
     painter->setBrush(color);
     painter->setPen(color);
diff --git a/src/month/monthscene.cpp b/src/month/monthscene.cpp
--- a/src/month/monthscene.cpp
+++ b/src/month/monthscene.cpp
@@ -184,7 +184,7 @@
     Q_ASSERT(mScene);
     PrefsPtr prefs = mScene->monthView()->preferences();
     p->setFont(prefs->monthViewFont());
-    p->fillRect(rect, palette().color(QPalette::Base));
+    p->fillRect(rect, palette().color(QPalette::Window));
 
     /*
       Headers
@@ -246,10 +246,18 @@
         MonthCell *cell = mScene->mMonthCellMap[ d ];
 
         QColor color;
-        if (workDays.contains(d)) {
-            color = mMonthView->preferences()->monthGridWorkHoursBackgroundColor();
+        if (!mMonthView->preferences()->useSystemColor()) {
+            if (workDays.contains(d)) {
+                color = mMonthView->preferences()->monthGridWorkHoursBackgroundColor();
+            } else {
+                color = mMonthView->preferences()->monthGridBackgroundColor();
+            }
         } else {
-            color = mMonthView->preferences()->monthGridBackgroundColor();
+            if (workDays.contains(d)) {
+                color = palette().color(QPalette::Base);
+            } else {
+                color = palette().color(QPalette::AlternateBase);
+            }
         }
         if (cell == mScene->selectedCell()) {
             color = color.darker(115);
@@ -280,10 +288,13 @@
         QLinearGradient bgGradient(QPointF(cellHeaderX, cellHeaderY),
                                    QPointF(cellHeaderX + cellHeaderWidth,
                                            cellHeaderY + cellHeaderHeight));
-        bgGradient.setColorAt(0, color.darker(105));
-        bgGradient.setColorAt(0.7, color.darker(105));
+        if ((color.blue() + color.red() + color.green()) > (256 / 2 * 3)) {
+            p->setBrush(color.darker(110));
+        } else {
+            p->setBrush(color.lighter(140));
+        }
+            
         bgGradient.setColorAt(1, color);
-        p->setBrush(bgGradient);
 
         p->setPen(Qt::NoPen);
         p->drawRect(QRect(cellHeaderX, cellHeaderY,
@@ -295,7 +306,13 @@
 
     p->setFont(font);
 
-    QPen oldPen = mMonthView->preferences()->monthGridBackgroundColor().darker(150);
+    QPen oldPen;
+    if (!mMonthView->preferences()->useSystemColor()) {
+        oldPen = mMonthView->preferences()->monthGridBackgroundColor().darker(150);
+    } else {
+        oldPen = palette().color(QPalette::WindowText).darker(150);
+    }
+    
 
     // Draw dates
     for (QDate d = mMonthView->actualStartDateTime().date();
@@ -311,7 +328,7 @@
         p->setFont(font);
 
         if (d.month() == mMonthView->currentMonth()) {
-            p->setPen(QPalette::Text);
+            p->setPen(palette().color(QPalette::WindowText));
         } else {
             p->setPen(oldPen);
         }
diff --git a/src/prefs.h b/src/prefs.h
--- a/src/prefs.h
+++ b/src/prefs.h
@@ -82,6 +82,9 @@
 
     void setSelectionStartsEditor(bool startEditor);
     Q_REQUIRED_RESULT bool selectionStartsEditor() const;
+    
+    void setUseSystemColor(bool useSystemColor);
+    Q_REQUIRED_RESULT bool useSystemColor() const;
 
     void setAgendaGridWorkHoursBackgroundColor(const QColor &color);
     Q_REQUIRED_RESULT QColor agendaGridWorkHoursBackgroundColor() const;
diff --git a/src/prefs.cpp b/src/prefs.cpp
--- a/src/prefs.cpp
+++ b/src/prefs.cpp
@@ -556,6 +556,16 @@
     }
 }
 
+void Prefs::setUseSystemColor(bool useSystemColor)
+{
+    d->setBool(d->mBaseConfig.useSystemColorItem(), useSystemColor);
+}
+
+bool Prefs::useSystemColor() const
+{
+    return d->getBool(d->mBaseConfig.useSystemColorItem());
+}
+
 void Prefs::setMarcusBainsShowSeconds(bool showSeconds)
 {
     d->setBool(d->mBaseConfig.marcusBainsShowSecondsItem(), showSeconds);