* Blonde: Think Cinderella, Rapunzel, or Aurora (Sleeping Beauty).
* Brown: Belle (Beauty and the Beast), Anna (Frozen), or Merida (Brave).
* Red: Ariel (The Little Mermaid).
* Black: Snow White, Pocahontas.
Ultimately, "princess hair" refers more to the health, shine, and styling of the hair. It's usually long, flowing, and well-maintained.