diff --git a/doc_src/python_docs_theme/static/pydoctheme.css b/doc_src/python_docs_theme/static/pydoctheme.css
index 87772e002..265b55014 100644
--- a/doc_src/python_docs_theme/static/pydoctheme.css
+++ b/doc_src/python_docs_theme/static/pydoctheme.css
@@ -338,3 +338,8 @@ kbd {
   color: #000;
   padding: 0.1em 0.3em;
 }
+
+.footnote {
+    background-color: #ddddea;
+    font-size: 90%;
+}