diff --git a/src/repl.rs b/src/repl.rs
index e90130b..f109326 100644
--- a/src/repl.rs
+++ b/src/repl.rs
@@ -379,6 +379,16 @@ impl Highlighter for AmCompleter {
                             bar
                         ))
                     }
+                } else if cells.len() == 3 {
+                    // Single-column menu (no descriptions, e.g. the theme
+                    // names): paint the bars and the name.
+                    let bar = self.theme.get().frame("│");
+                    Cow::Owned(format!(
+                        "{}{}{}",
+                        bar,
+                        self.theme.get().acc(cells[1]),
+                        bar
+                    ))
                 } else {
                     Cow::Borrowed(candidate)
                 }
@@ -1775,6 +1785,22 @@ mod tests {
         assert!(widths.iter().all(|w| *w == widths[0]), "unaligned box:\n{text}");
     }
 
+    #[test]
+    fn completion_menu_paints_single_column_bars() {
+        let c = completer();
+        c.set_theme(crate::theme::find("ocean").unwrap());
+        let row = "│ ocean     │";
+        let out = c.highlight_candidate(row, rustyline::CompletionType::List);
+        assert!(
+            out.contains("\x1b[38;5;75m"),
+            "bars not painted with the frame color: {out}"
+        );
+        assert!(
+            out.contains("\x1b[1;38;5;81m"),
+            "name not painted with the accent color: {out}"
+        );
+    }
+
     #[test]
     fn banner_top_border_right_dashes_keep_the_frame_color() {
         let session = test_session();