Update index.html

index.html

@@ -1084,7 +1084,7 @@ <h3>
           whose [^meta/name^] attribute is "[^meta/name/theme-color^]".
           However, the user agent SHOULD NOT override the [=default theme
           color=] via an [^meta^] element whose [^meta/name^] attribute is
-          "theme-color" for documents that are not [=within scope=], since the
+          "theme-color" for documents' [=Document/URL=] are not [=URL/within scope=], since the
           application has no control over these documents.
         </p>
         <p data-cite="CSS-COLOR-4">