diff --git a/nw/gui/tools/dochighlight.py b/nw/gui/tools/dochighlight.py
index 6cbd594c..f20aece1 100644
--- a/nw/gui/tools/dochighlight.py
+++ b/nw/gui/tools/dochighlight.py
@@ -234,20 +234,20 @@ class GuiDocHighlighter(QSyntaxHighlighter):
             return
 
         elif theText.startswith("# "): # Header 1
-            self.setFormat(0, 1, self.hStyles["header1"])
-            self.setFormat(1, len(theText), self.hStyles["header1h"])
+            self.setFormat(0, 1, self.hStyles["header1h"])
+            self.setFormat(1, len(theText), self.hStyles["header1"])
 
         elif theText.startswith("## "): # Header 2
-            self.setFormat(0, 2, self.hStyles["header2"])
-            self.setFormat(2, len(theText), self.hStyles["header2h"])
+            self.setFormat(0, 2, self.hStyles["header2h"])
+            self.setFormat(2, len(theText), self.hStyles["header2"])
 
         elif theText.startswith("### "): # Header 3
-            self.setFormat(0, 3, self.hStyles["header3"])
-            self.setFormat(3, len(theText), self.hStyles["header3h"])
+            self.setFormat(0, 3, self.hStyles["header3h"])
+            self.setFormat(3, len(theText), self.hStyles["header3"])
 
         elif theText.startswith("#### "): # Header 4
-            self.setFormat(0, 4, self.hStyles["header4"])
-            self.setFormat(4, len(theText), self.hStyles["header4h"])
+            self.setFormat(0, 4, self.hStyles["header4h"])
+            self.setFormat(4, len(theText), self.hStyles["header4"])
 
         elif theText.startswith("%"): # Comments
             self.setFormat(0, len(theText), self.hStyles["hidden"])