Red man, White man

Walk signals in Amsterdam and, I think, most of the rest of Europe, are, like traffic signals, red and green. We trained Felix to recognize these signals, admonishing him at every corner to look for "green man." There is no green man here. There is a white man instead. No obvious reason for this, but no obvious problem either. Not at first glance, anyway: Today, waiting for the light, Felix next to me on his loopfiets. Light changes, Felix zooms into the crosswalk screaming "White Man"! Black man crossing in the other direction raises an eyebrow.

Now what?