diff --git a/src/eva2/gui/FunctionArea.java b/src/eva2/gui/FunctionArea.java
index 75d4f511..7272113e 100644
--- a/src/eva2/gui/FunctionArea.java
+++ b/src/eva2/gui/FunctionArea.java
@@ -263,7 +263,7 @@ public class FunctionArea extends DArea implements Serializable {
 						}
 
 					}
-					if (FunctionArea.this.m_PointSetContainer.size() > 0) {
+					if (FunctionArea.this.m_PointSetContainer.size() > 0) { // there is at least one graph
 						String togGTTName = (isShowGraphToolTips() ? "Deactivate":"Activate") + " graph tool tips";
 						JMenuItem togGraphToolTips = new JMenuItem(togGTTName);
 						togGraphToolTips.addActionListener(new ActionListener() {
@@ -291,17 +291,23 @@ public class FunctionArea extends DArea implements Serializable {
 						});
 						GraphMenu.add(removeGraph);
 
-						JMenuItem changecolorGraph = new JMenuItem(
-								"Change color");
-						changecolorGraph
-								.addActionListener(new ActionListener() {
-									public void actionPerformed(ActionEvent ee) {
-										changeColorGraph(FunctionArea.this.m_x,
-												FunctionArea.this.m_y);
-									}
-								});
+						JMenuItem changecolorGraph = new JMenuItem("Change graph color");
+						changecolorGraph.addActionListener(new ActionListener() {
+							public void actionPerformed(ActionEvent ee) {
+								changeColorGraph(FunctionArea.this.m_x,
+										FunctionArea.this.m_y);
+							}
+						});
 						GraphMenu.add(changecolorGraph);
 
+						JMenuItem changeAllColors = new JMenuItem("Recolor all graphs");
+						changeAllColors.addActionListener(new ActionListener() {
+							public void actionPerformed(ActionEvent ee) {
+								recolorAllGraphsByIndex();
+							}
+						});
+						GraphMenu.add(changeAllColors);
+
 						JMenuItem removePoint = new JMenuItem("Remove point");
 						removePoint.addActionListener(new ActionListener() {
 							public void actionPerformed(ActionEvent ee) {
@@ -335,6 +341,10 @@ public class FunctionArea extends DArea implements Serializable {
 		getGraphPointSet(GraphLabel).incColor();
 		repaint();
 	}
+	
+	public void setColorByIndex(int graphLabel, int colorIndex) {
+		getGraphPointSet(graphLabel).setColorByIndex(colorIndex);
+	}
 
 	/**
 	  *
@@ -349,6 +359,21 @@ public class FunctionArea extends DArea implements Serializable {
 		updateLegend();
 	}
 
+	/**
+	 * Re-color all graphs which are nonempty by their index.
+	 * 
+	 */
+	public void recolorAllGraphsByIndex() {
+		int index=0;
+		for (int i=0; i<m_PointSetContainer.size(); i++) {
+			GraphPointSet gps = ((GraphPointSet) (this.m_PointSetContainer.get(i)));
+			if (gps.getPointCount()>0) {
+				gps.setColorByIndex(index);
+				index++;
+			}
+		}
+	}
+
 	/**
 	 * 
 	 * @return
diff --git a/src/eva2/gui/Graph.java b/src/eva2/gui/Graph.java
index 85d92d9e..cafed48c 100644
--- a/src/eva2/gui/Graph.java
+++ b/src/eva2/gui/Graph.java
@@ -102,6 +102,10 @@ public class Graph implements Serializable {
     m_Plotter.jump();
   }
   
+  public void setColorByIndex(int j) {
+	  ((Plot)m_Plotter).setColorByIndex(m_GraphLabel, j);
+  }
+  
 //  public boolean isValid() { // this was evil in RMI, use GraphWindow instead
 //	  //return true;
 //	  return (m_Plotter != null) && (m_Plotter.getFunctionArea() != null);
diff --git a/src/eva2/gui/GraphPointSet.java b/src/eva2/gui/GraphPointSet.java
index 8b9fbeec..6567da91 100644
--- a/src/eva2/gui/GraphPointSet.java
+++ b/src/eva2/gui/GraphPointSet.java
@@ -33,6 +33,18 @@ import eva2.tools.math.Mathematics;
   *
   */
 public class GraphPointSet {
+	// Color sequence of the plot graphs
+	public static Color[] colorSequence = 
+		new Color[]{
+		Color.black, Color.red, Color.blue, Color.pink, Color.green,
+			Color.gray, Color.magenta, Color.cyan, Color.orange, 
+			new Color(148, 0, 211), // dark violet,
+			new Color(72  ,	 209  	, 204), // turquoise
+			new Color(128  	 ,128  	 ,0), // olive
+	 		new Color(34  	 ,139  	 ,34), // forest green
+			new Color(100  	 ,149  	 ,237 ) // cornflower 
+	};
+	
 	/**
 	 * 
 	 */
@@ -404,41 +416,8 @@ public class GraphPointSet {
 	 * @return
 	 */
 	private Color indexToColor(int index) {
-		Color c = Color.black;
-		int k = index % 10;
-		switch (k) {
-		case 0:
-			c = Color.black;
-			break;
-		case 1:
-			c = Color.red;
-			break;
-		case 2:
-			c = Color.blue;
-			break;
-		case 3:
-			c = Color.pink;
-			break;
-		case 4:
-			c = Color.green;
-			break;
-		case 5:
-			c = Color.gray;
-			break;
-		case 6:
-			c = Color.magenta;
-			break;
-		case 7:
-			c = Color.cyan;
-			break;
-		case 8:
-			c = Color.orange;
-			break;
-		case 9:
-			c = Color.darkGray;
-			break;
-		}
-		return c;
+		int k = index % colorSequence.length;
+		return colorSequence[k];
 	}
 
 	/**
diff --git a/src/eva2/gui/Plot.java b/src/eva2/gui/Plot.java
index 5c6d4a23..e6299117 100644
--- a/src/eva2/gui/Plot.java
+++ b/src/eva2/gui/Plot.java
@@ -490,6 +490,14 @@ public class Plot implements PlotInterface, Serializable {
 		setUnconnectedPoint(range[0][1], range[1][1], graphLabel);
 	}
 
+	public void setColorByIndex(int graphLabel, int index) {
+		getFunctionArea().setColorByIndex(graphLabel, index);
+	}
+
+	public void recolorAllGraphsByIndex() {
+		getFunctionArea().recolorAllGraphsByIndex();
+	}
+	
 	// /**
 	// * Just for testing the Plot class.
 	// */