In the fifth episode of Season 3, the show revealed Felicity’s “origin story” and her penchant for dressing like a goth at the time revealed Felicity does like to change her look from time to time.
It is not the first time Arrow viewers have seen the genius sporting a look very similar to this.
While her new hair color is one of the more initially apparent changes, Felicity has made to her visage, in the picture above she is also showing off some piercings.