diff --git a/examples/code_browser.py b/examples/code_browser.py
index 93e06056d..14fa0216f 100644
--- a/examples/code_browser.py
+++ b/examples/code_browser.py
@@ -31,9 +31,15 @@ class CodeBrowser(App):
     def on_directory_tree_file_click(self, event: DirectoryTree.FileClick) -> None:
         code_view = self.query_one("#code", Static)
         try:
-            syntax = Syntax.from_path(event.path, line_numbers=True, word_wrap=True)
+            syntax = Syntax.from_path(
+                event.path,
+                line_numbers=True,
+                word_wrap=True,
+                indent_guides=True,
+                theme="monokai",
+            )
         except Exception:
-            code_view.update(Traceback())
+            code_view.update(Traceback(theme="monokai", width=None))
             self.sub_title = "ERROR"
         else:
             code_view.update(syntax)
diff --git a/src/textual/widget.py b/src/textual/widget.py
index ea0140b7f..1d9864e81 100644
--- a/src/textual/widget.py
+++ b/src/textual/widget.py
@@ -581,7 +581,7 @@ class Widget(DOMNode):
         Returns:
             Region: Screen region that contains a widget's content.
         """
-        content_region = self.region.shrink(self.gutter)
+        content_region = self.region.shrink(self.styles.gutter)
         return content_region
 
     @property