diff --git a/aqt/editor.py b/aqt/editor.py
index 405716a7b..a97c31511 100644
--- a/aqt/editor.py
+++ b/aqt/editor.py
@@ -81,15 +81,15 @@ class Editor:
         righttopbtns.append(self._addButton('text_clear', 'clear', _("Remove formatting (Ctrl+R)")))
         # The color selection buttons do not use an icon so the HTML must be specified manually
         tip = _("Set foreground colour (F7)")
-        righttopbtns.append(f'''<button tabindex=-1 class=linkb title="{tip}"
+        righttopbtns.append('''<button tabindex=-1 class=linkb title="{}"
             type="button" onclick="pycmd('colour');return false;">
             <div id=forecolor style="display:inline-block; background: #000;border-radius: 5px;"
-            class=topbut></div></button>''')
+            class=topbut></div></button>'''.format(tip))
         tip = _("Change colour (F8)")
-        righttopbtns.append(f'''<button tabindex=-1 class=linkb title="{tip}"
+        righttopbtns.append('''<button tabindex=-1 class=linkb title="{}"
             type="button" onclick="pycmd('changeCol');return false;">
             <div style="display:inline-block; border-radius: 5px;"
-            class="topbut rainbow"></div></button>''')
+            class="topbut rainbow"></div></button>'''.format(tip))
         righttopbtns.append(self._addButton('text_cloze', 'cloze', _("Cloze deletion (Ctrl+Shift+C)")))
         righttopbtns.append(self._addButton('paperclip', 'attach', _("Attach pictures/audio/video (F3)")))
         righttopbtns.append(self._addButton('media-record', 'record', _("Record audio (F5)")))