Why is Ramses II hair red?

I'm curious to know, could you please elaborate on why the renowned pharaoh Ramses II is depicted with red hair in many of his statues and depictions? Was this a stylistic choice by the artists of his time, or is there some historical or cultural significance behind the color of his hair that we might not be aware of? It's quite an intriguing detail that stands out among the numerous fascinating aspects of this ancient ruler's legacy.