It's a cute film but it's not so much noir as a parody of noir, complete with "hard boiled " dialogue all set in a high school. Highly watchable.I'm personally opposed to colorizing classic film noir movies... However, I have been amazed by modern colored noir movies. One of my favorite films in recent years was Brick by Rian Johnson (director of Star Wars: The Last Jedi). Trailer below:
I highly recommend checking this movie out.