Index: trunk/src/org/openstreetmap/josm/gui/preferences/display/ColorPreference.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/preferences/display/ColorPreference.java	(revision 9685)
+++ trunk/src/org/openstreetmap/josm/gui/preferences/display/ColorPreference.java	(revision 9686)
@@ -10,4 +10,6 @@
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -221,4 +223,12 @@
             }
         };
+        colors.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mousePressed(MouseEvent me) {
+                if (me.getClickCount() == 2) {
+                    colorEdit.doClick();
+                }
+            }
+        });
         colors.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
         final TableCellRenderer oldColorsRenderer = colors.getDefaultRenderer(Object.class);