Icon notifications on Android - white on white

Love Webpushr. However when I get a message notification on my mobile from my website I can’t see my icon because it’s much too light. My icon looks white and on a white screen it’s practically invisible.
How can I change that? I uploaded my icons and its not white.
See here: https://photos.app.goo.gl/kD8YT31RpYNhvaYZ9


For the notification badge, the image must use alpha channels so it appear on both light and dark backgrounds. Example images below