diff --git a/wagtail/admin/rich_text/editors/hallo.py b/wagtail/admin/rich_text/editors/hallo.py
index 47fdd24b7..a0e00880d 100644
--- a/wagtail/admin/rich_text/editors/hallo.py
+++ b/wagtail/admin/rich_text/editors/hallo.py
@@ -134,7 +134,7 @@ class HalloRichTextArea(WidgetWithScript, widgets.Textarea):
             'wagtailadmin/js/vendor/hallo.js',
             'wagtailadmin/js/hallo-bootstrap.js',
         ], css={
-            'all': ['wagtailadmin/css/panels/rich-text.css']
+            'all': ['wagtailadmin/css/panels/hallo.css']
         })
 
         for plugin in self.plugins:
diff --git a/wagtail/admin/static_src/wagtailadmin/scss/panels/rich-text.scss b/wagtail/admin/static_src/wagtailadmin/scss/panels/hallo.scss
similarity index 100%
rename from wagtail/admin/static_src/wagtailadmin/scss/panels/rich-text.scss
rename to wagtail/admin/static_src/wagtailadmin/scss/panels/hallo.scss