diff --git a/docs/_static/css/custom.css b/docs/_static/css/custom.css
index d7c2f16460..4dabb725d0 100644
--- a/docs/_static/css/custom.css
+++ b/docs/_static/css/custom.css
@@ -1,3 +1,7 @@
 a.external {
     overflow-wrap: anywhere;
 }
+
+div .wy-side-nav-search > div.version {
+    color: rgba(0,0,0,0.75);
+}