Fix external user badge color

app/assets/stylesheets/framework/variables.scss

@@ -141,6 +141,11 @@ $border-gray-normal: darken($gray-normal, $darken-border-factor);
 $border-gray-normal-dashed: darken($gray-normal, $darken-border-dashed-factor);
 $border-gray-dark: darken($white-normal, $darken-border-factor);
 
+/*
+ * Override Bootstrap 4 variables
+ */
+$secondary: $gray-light;
+
 /*
  * UI elements
  */