Short of wearing a white fleece with bright pink hearts on it, nothing.
Because your face isn’t threatening.
The people being threatened by you, are being threatened by their racism, and that’s not your fault.
Keep living your best life, and keep proving them wrong. They’ll figure it out eventually, one by one.
I’m in my mid 30s, having women tell me of the psychological fights that NO ONE TOLD ME WERE EVEN HAPPENING, AND NO-ONE GOT ME.
Anyway, I now have a great love life. So long as you’re not dead, there’s always time for it to sort itself out. Be patient and focus on yourself.