--- a/toolkit/themes/windows/global/tooltip.css
+++ b/toolkit/themes/windows/global/tooltip.css
@@ -15,29 +15,26 @@ tooltip {
   max-width: 40em;
   background-color: InfoBackground;
   color: InfoText;
   font: message-box;
 }
 
 @media (-moz-windows-default-theme) {
   tooltip {
-    /* These are the same colors as --menu-background-color and co., but we
-       can't quite use them because the default tooltip is native anonymous and
-       doesn't inherit from the root. */
     background-color: #f9f9fb;
-    color: #15141a;
-    border-color: #cfcfd8;
+    color: black;
+    border-color: #67676c;
     border-radius: 4px;
   }
 
   @media (prefers-color-scheme: dark) {
     tooltip {
       background-color: #2b2a33;
-      color: #fbfbfe;
-      border-color: #5b5b66;
+      color: white;
+      border-color: #f9f9fb;
     }
   }
 }
 
 tooltip:not([position]) {
   margin-top: 21px;
 }