diff --git a/platform/platform-impl/src/com/intellij/ide/ui/LafManagerImpl.java b/platform/platform-impl/src/com/intellij/ide/ui/LafManagerImpl.java
index d1ed40e06812..6f4c84bbfc0b 100644
--- a/platform/platform-impl/src/com/intellij/ide/ui/LafManagerImpl.java
+++ b/platform/platform-impl/src/com/intellij/ide/ui/LafManagerImpl.java
@@ -437,6 +437,15 @@ public final class LafManagerImpl extends LafManager implements ApplicationCompo
       updateUI(frame);
     }
     fireLookAndFeelChanged();
+    
+    fixSeparatorColor(uiDefaults);
+  }
+
+  private static void fixSeparatorColor(UIDefaults uiDefaults) {
+    if (UIUtil.isUnderAquaLookAndFeel()) {
+      uiDefaults.put("Separator.background", UIUtil.SEPARATOR_BACKGROUND_COLOR);
+      uiDefaults.put("Separator.foreground", UIUtil.SEPARATOR_FOREGROUND_COLOR);
+    }
   }
 
   /**
diff --git a/platform/util/src/com/intellij/util/ui/UIUtil.java b/platform/util/src/com/intellij/util/ui/UIUtil.java
index 929d76c9ea9f..b61772892000 100644
--- a/platform/util/src/com/intellij/util/ui/UIUtil.java
+++ b/platform/util/src/com/intellij/util/ui/UIUtil.java
@@ -113,6 +113,8 @@ public class UIUtil {
   private static final Color ACTIVE_HEADER_COLOR = new Color(160, 186, 213);
   private static final Color INACTIVE_HEADER_COLOR = new Color(128, 128, 128);
   private static final Color BORDER_COLOR = Color.LIGHT_GRAY;
+  public static final Color SEPARATOR_FOREGROUND_COLOR = new Color(200, 200, 200);
+  public static final Color SEPARATOR_BACKGROUND_COLOR = new Color(250, 250, 250);
 
   public static final int DEFAULT_HGAP = 10;
   public static final int DEFAULT_VGAP = 5;