It's interesting that there has never been a live action Jimmy Olsen that was a red head with freckles. Not Jack Larson, not Mark McClure, Michael Landes, Justin Whalin, Aaron Ashmore, Ryan Harder, Sam Huntington, or Michael Cassidy.
Wouldn't it be ironic if Supergirl's Jimmy actually is a red head but he shaves his head because people made fun of a black kid with red hair.