diff --git a/src/main/java/rvc/timecalc/Battery.java b/src/main/java/rvc/timecalc/Battery.java
index bfd52ea..376abf3 100644
--- a/src/main/java/rvc/timecalc/Battery.java
+++ b/src/main/java/rvc/timecalc/Battery.java
@@ -45,7 +45,9 @@ public class Battery extends Widget {
         g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                 RenderingHints.VALUE_ANTIALIAS_ON);
 
-        g2d.fillRect(width_ / 4, 1, width_, totalHeight - 2);
+        if(!Utils.ultraLight.get()) {
+            g2d.fillRect(width_ / 4, 1, width_, totalHeight - 2);
+        }
         g2d.setColor(Utils.highlighted.get() || mouseOver ? Color.BLACK :
                 Color.LIGHT_GRAY);
         g2d.drawRect(width_ / 4 - 1, 0, width_ + 1, totalHeight + 0);
@@ -59,6 +61,9 @@ public class Battery extends Widget {
             g2d.setColor(donePercent < 0.1 ? LOW : (donePercent < 0.75 ?
                     MEDIUM : (donePercent < 0.9 ? HIGH : HIGHEST)));
         }
+        if(Utils.ultraLight.get()) {
+            g2d.setColor(Utils.ULTRA_LIGHT_GRAY);
+        }
         int doneHeight = (int) (totalHeight * donePercent);
         int intX = width_ / 4;
         int todoHeight = totalHeight - doneHeight;
diff --git a/src/main/java/rvc/timecalc/TimeCalcWindow.java b/src/main/java/rvc/timecalc/TimeCalcWindow.java
index 35796c3..623e13e 100644
--- a/src/main/java/rvc/timecalc/TimeCalcWindow.java
+++ b/src/main/java/rvc/timecalc/TimeCalcWindow.java
@@ -102,6 +102,11 @@ public class TimeCalcWindow {
                 if(e.getKeyCode() == KeyEvent.VK_DOWN){
                     everythingHidden = true;
                 }
+
+                if(e.getKeyCode() == KeyEvent.VK_G){
+                    Utils.ultraLight.flip();
+                }
+
                 window.repaint();
             }
         });
@@ -203,7 +208,6 @@ public class TimeCalcWindow {
         calNow.setTime(new Date());
         LocalDate ld = LocalDate.of(calNow.get(Calendar.YEAR),calNow.get(Calendar.MONTH) + 1,1);
         DayOfWeek firstDayOfMonth = ld.getDayOfWeek();
-        System.out.println("dow=" + firstDayOfMonth);
         int currentDayOfMonth = calNow.get(Calendar.DAY_OF_MONTH);
 
         int workDaysDone = 0;
@@ -241,6 +245,7 @@ public class TimeCalcWindow {
                 window.dispose();
                 break;
             }
+
             text.setVisible(!everythingHidden);
             progressSquare.setVisible(!everythingHidden);
             progressCircle.setVisible(!everythingHidden);
diff --git a/src/main/java/rvc/timecalc/Utils.java b/src/main/java/rvc/timecalc/Utils.java
index 2cf2277..080182f 100644
--- a/src/main/java/rvc/timecalc/Utils.java
+++ b/src/main/java/rvc/timecalc/Utils.java
@@ -13,6 +13,8 @@ import java.nio.file.Files;
  */
 public class Utils {
     public static final BooleanHolder highlighted = new BooleanHolder();
+    public static final BooleanHolder ultraLight = new BooleanHolder();
+    public static final Color ULTRA_LIGHT_GRAY = new Color(216,216,216);
     /**
      * Count of bytes per one kilobyte.
      */