I suspect that Jo Rowling probably imagined James and Harry as white too, i don’t mind that, that’s her business.
Personally I’m mentally acting against the white-as-default-unless-otherwise-specified that’s pervasive in imagining media especially in predominately white fandom culture.
I’ve generally operated on a POC-unless-otherwise-noted basis with how I imagine characters. My HP headcanons aren’t What If Everybody In Harry Potter Was Black Instead Of White. They only read that way if you’re still stuck in the white-as-default zone.
James’ skin color, hair texture, etc to my knowledge has never been specified and that means to me that even a reader who strictly contains themselves within the bounds of canon is free to imagine him as any number of ethnicities.
In absence of a specified race I chose to imagine the one that makes the story most compelling to me.
The James as black headcannon not only works, it adds a whole different depth to the story. First off, Veron’s intenser hatred for James than Lily, The whole Pure-Race dogma of the death eaters, the fact that James, though pureblood, didn’t seem to have any Death Eater family members like Sirius did.
Then Harry as mixed, the teasing he got as school, the fact that he was never mistaken for an actual relative of the Dursley’s in public. His black uncontrollable hair that his white family had NO IDEA how to deal with. His eyes were always considered striking though it’s not an unusual color for whites.
Screw it, headcannon accepted.
Girls are told to be skinny but not too skinny and to wear makeup but not so much that guys can tell and to dress in revealing clothes but not too revealing or else you’re a slut and a hundred other contradictory standards so I think guys can deal with being made fun of for wearing fedoras
Do not touch your body with bad intentions. Rub your belly when it is full. Stroke your soft skin. Hug yourself, even if it’s silly, because it feels nice. Pleasure yourself. Do not touch your body with bad intentions. Do not pinch at the fat on your stomach. Do not scratch at your skin. Do not hate the shell you’re encased in.