Oops

app/src/main/java/eu/faircode/email/Core.java

@@ -4715,9 +4715,11 @@ class Core {
 
             if (pro) {
                 Integer color = getColor(message);
+                if (color != null) {
                     mbuilder.setColor(color);
                     mbuilder.setColorized(true);
                 }
+            }
 
             // https://developer.android.com/training/wearables/notifications
             // https://developer.android.com/reference/androidx/core/app/NotificationCompat.Action.WearableExtender