Index: /trunk/sources/HeuristicLab.Analysis.Views/3.3/ScatterPlotDataRowVisualPropertiesControl.Designer.cs
===================================================================
--- /trunk/sources/HeuristicLab.Analysis.Views/3.3/ScatterPlotDataRowVisualPropertiesControl.Designer.cs	(revision 14983)
+++ /trunk/sources/HeuristicLab.Analysis.Views/3.3/ScatterPlotDataRowVisualPropertiesControl.Designer.cs	(revision 14984)
@@ -65,4 +65,5 @@
       this.regressionLegendTextBox = new System.Windows.Forms.TextBox();
       this.toolTip = new System.Windows.Forms.ToolTip(this.components);
+      this.clearColorButton = new System.Windows.Forms.Button();
       ((System.ComponentModel.ISupportInitialize)(this.pointSizeNumericUpDown)).BeginInit();
       this.regressionGroupBox.SuspendLayout();
@@ -278,7 +279,24 @@
       this.regressionLegendTextBox.Validated += new System.EventHandler(this.regressionLegendTextBox_Validated);
       // 
+      // clearColorButton
+      // 
+      this.clearColorButton.BackColor = System.Drawing.SystemColors.ActiveCaption;
+      this.clearColorButton.Cursor = System.Windows.Forms.Cursors.Default;
+      this.clearColorButton.FlatAppearance.BorderSize = 0;
+      this.clearColorButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+      this.clearColorButton.ForeColor = System.Drawing.Color.Transparent;
+      this.clearColorButton.Location = new System.Drawing.Point(125, 65);
+      this.clearColorButton.Margin = new System.Windows.Forms.Padding(0);
+      this.clearColorButton.Name = "clearColorButton";
+      this.clearColorButton.Size = new System.Drawing.Size(15, 16);
+      this.clearColorButton.TabIndex = 11;
+      this.clearColorButton.TabStop = false;
+      this.clearColorButton.UseVisualStyleBackColor = false;
+      this.clearColorButton.Click += new System.EventHandler(this.clearColorButton_Click);
+      // 
       // ScatterPlotDataRowVisualPropertiesControl
       // 
       this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Inherit;
+      this.Controls.Add(this.clearColorButton);
       this.Controls.Add(this.regressionGroupBox);
       this.Controls.Add(this.pointSizeNumericUpDown);
@@ -324,4 +342,5 @@
     private System.Windows.Forms.ToolTip toolTip;
     private System.Windows.Forms.CheckBox isRegressionVisibleInLegendCheckBox;
+    private System.Windows.Forms.Button clearColorButton;
   }
 }
Index: /trunk/sources/HeuristicLab.Analysis.Views/3.3/ScatterPlotDataRowVisualPropertiesControl.cs
===================================================================
--- /trunk/sources/HeuristicLab.Analysis.Views/3.3/ScatterPlotDataRowVisualPropertiesControl.cs	(revision 14983)
+++ /trunk/sources/HeuristicLab.Analysis.Views/3.3/ScatterPlotDataRowVisualPropertiesControl.cs	(revision 14984)
@@ -23,4 +23,5 @@
 using System.Drawing;
 using System.Windows.Forms;
+using HeuristicLab.Common.Resources;
 using HeuristicLab.MainForm;
 using HeuristicLab.MainForm.WindowsForms;
@@ -45,4 +46,6 @@
       pointStyleComboBox.DataSource = Enum.GetValues(typeof(ScatterPlotDataRowVisualProperties.ScatterPlotDataRowPointStyle));
       regressionTypeComboBox.DataSource = Enum.GetValues(typeof(ScatterPlotDataRowVisualProperties.ScatterPlotDataRowRegressionType));
+      clearColorButton.BackColor = Color.Transparent;
+      clearColorButton.BackgroundImage = VSImageLibrary.Delete;
       SetEnabledStateOfControls();
     }
@@ -87,5 +90,5 @@
       pointStyleComboBox.Enabled = Content != null;
       colorButton.Enabled = Content != null;
-      colorButton.Enabled = Content != null;
+      clearColorButton.Visible = Content != null && !Content.Color.IsEmpty;
       isVisibleInLegendCheckBox.Enabled = Content != null;
       pointSizeNumericUpDown.Enabled = Content != null;
@@ -111,4 +114,14 @@
         colorButton.BackColor = Content.Color;
         colorButton.Text = String.Empty;
+        clearColorButton.Visible = true;
+      }
+    }
+
+    private void clearColorButton_Click(object sender, EventArgs e) {
+      if (!SuppressEvents && Content != null) {
+        Content.Color = Color.Empty;
+        colorButton.BackColor = SystemColors.Control;
+        colorButton.Text = "?";
+        clearColorButton.Visible = false;
       }
     }
