diff --git a/docs/src/_includes/components/logo.html b/docs/src/_includes/components/logo.html
index 1b874feb223..5e422b6fa3c 100644
--- a/docs/src/_includes/components/logo.html
+++ b/docs/src/_includes/components/logo.html
@@ -5,7 +5,7 @@
         }
 
         [data-theme="dark"] #logo-center {
-            opacity: 60%;
+            opacity: 0.6;
         }
     </style>
     <svg class="brand-logo" width="203" height="58" viewBox="0 0 203 58" fill="none" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="ESLint logo">