fixup! Bug 27476: Implement about:torconnect captive portal within Tor Browser

Bug 41659: Add canonical color definitions to base-browser

browser/components/torconnect/content/aboutTorConnect.css

@@ -2,7 +2,7 @@
 /* Copyright (c) 2021, The Tor Project, Inc. */
 
 @import url("chrome://browser/skin/error-pages.css");
-@import url("chrome://branding/content/tor-styles.css");
+@import url("chrome://browser/skin/browser-colors.css");
 
 :root {
   --onion-opacity: 1;
@@ -317,5 +317,5 @@ body {
 
 .title.location {
   background-image: url("chrome://browser/content/torconnect/connection-location.svg");
-  stroke: var(--torbrowser-warning);
+  stroke: var(--warning-color);
 }