I like border. But would also love an option to have it as a color circle before the name. If the color is on its own it won't get mixed with the color of the image and maybe be more memorable. 

 Color circle example  https://image.nostr.build/af3e120bec8590f4bf240eba50cecff4b72bdff8ad3dbdc16ebe55455c4c7b48.jpg