Why does Alexandra Daddairo have blue eyes in The Lightning Thief?

Alexandra Daddario does not have blue eyes in *The Lightning Thief*. The character of Annabeth Chase, portrayed by Alexandra Daddario in the movie adaptation, is described as having grey eyes in the book.

This is a common occurrence in movie adaptations, where filmmakers sometimes change physical characteristics of characters for aesthetic reasons or to better suit the casting choice.