Index: src/org/openstreetmap/josm/gui/preferences/display/ColorPreference.java
===================================================================
--- src/org/openstreetmap/josm/gui/preferences/display/ColorPreference.java	(revision 16392)
+++ src/org/openstreetmap/josm/gui/preferences/display/ColorPreference.java	(working copy)
@@ -47,6 +47,7 @@
 import org.openstreetmap.josm.gui.layer.OsmDataLayer;
 import org.openstreetmap.josm.gui.layer.gpx.GpxDrawHelper;
 import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
+import org.openstreetmap.josm.gui.mappaint.MapPaintStyles;
 import org.openstreetmap.josm.gui.preferences.PreferenceSetting;
 import org.openstreetmap.josm.gui.preferences.PreferenceSettingFactory;
 import org.openstreetmap.josm.gui.preferences.PreferenceTabbedPane;
@@ -390,7 +391,6 @@
 
     @Override
     public boolean ok() {
-        boolean ret = false;
         for (ColorEntry d : tableModel.getDeleted()) {
             d.toProperty().remove();
         }
@@ -397,11 +397,11 @@
         for (ColorEntry e : tableModel.getData()) {
             if (e.info.getValue() != null && e.toProperty().put(e.info.getValue())
                     && NamedColorProperty.COLOR_CATEGORY_MAPPAINT.equals(e.info.getCategory())) {
-                ret = true;
+                MapPaintStyles.readFromPreferences();
             }
         }
         OsmDataLayer.createHatchTexture();
-        return ret;
+        return false;
     }
 
     @Override