Use different colour for 'Return value: Borrowed reference'

Author: hugovk

Diff for: python_docs_theme/static/pydoctheme.css

@@ -323,8 +323,18 @@ div.footer a:hover {
     color: #0095c4;
 }
 
+/* C API return value annotations */
+:root {
+    --refcount: #060;
+    --refcount-return-borrowed-ref: rgb(133 72 38);
+}
+
 .refcount {
-    color: #060;
+    color: var(--refcount);
+}
+
+.refcount.return_borrowed_ref {
+    color: var(--refcount-return-borrowed-ref)
 }
 
 .stableabi {

Diff for: python_docs_theme/static/pydoctheme_dark.css

@@ -79,8 +79,11 @@ table.docutils th {
     background-color: #424242;
 }
 
-.refcount {
-    color: #afa;
+/* C API return value annotations */
+
+:root {
+    --refcount: #afa;
+    --refcount-return-borrowed-ref: rgb(244, 227, 76);
 }
 
 .stableabi {