On a comparable note, Sleeping Beauty’s Aurora is the main princess who has violet eyes.
No, certainly not hazel.
In the event that there was disarray, Ariel was made a redhead to separate her from Daryl Hannah’s mermaid character in Splash.
Since Splash turned out in 1984, Disney makers needed Ariel to stand apart by giving her brilliant red hair.
Since, you know, it’s difficult to tell an animation from a real lady/mermaid.