I had a book of short mystery stories when I was younger. I think it was called Five Minute Mysteries or something like that. They were kind of like Encyclopedia Brown but aimed at an older audience. I distinctly remember the solution to one of the mysteries being that a woman was an impostor because the real woman was known to be very fashion-conscious and had a closet full of nothing but pink outfits, but the woman claiming to be her was redheaded. The detective knew that pink clashed with red hair and a fashion-conscious woman would prefer blue or green outfits. So based on my vague memories of a book I don’t remember the title of, you’ve chosen good colours.
