diff --git a/site/static/docs/5.3/assets/js/color-modes.js b/site/static/docs/5.3/assets/js/color-modes.js
index 9f22daa1b286..31f22f9e4f88 100644
--- a/site/static/docs/5.3/assets/js/color-modes.js
+++ b/site/static/docs/5.3/assets/js/color-modes.js
@@ -20,8 +20,8 @@
   }
 
   const setTheme = theme => {
-    if (theme === 'auto' && window.matchMedia('(prefers-color-scheme: dark)').matches) {
-      document.documentElement.setAttribute('data-bs-theme', 'dark')
+    if (theme === 'auto') {
+      document.documentElement.setAttribute('data-bs-theme', (window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'))
     } else {
       document.documentElement.setAttribute('data-bs-theme', theme)
     }