Bug 1701003 - Use the darker toolbar text color in Light that was already being used in browser-custom-colors.inc.css. r=mstriemer

Differential Revision: https://phabricator.services.mozilla.com/D109973

browser/themes/addons/light/manifest.json

@@ -35,7 +35,7 @@
       "toolbar_field_border": "transparent",
       "toolbar_field_focus": "white",
       "toolbar_field_separator": "rgb(240,240,244)",
-      "toolbar_text": "#5B5B66",
+      "toolbar_text": "rgb(21,20,26)",
       "ntp_background": "#F9F9FA",
       "ntp_text": "rgb(12, 12, 13)",
       "popup_action_color": "rgb(21,20,26)",