Keeping an eye on the show's hairstyles is also a good way to understand the relationship dynamics between the various characters (like why Princess Rhaenyra's sons have dark brown hair instead of ...

Rhaenyra’s children have dark hair in House of the Dragon because their father is Harwin of House Strong, not Laenor Velaryon. Harwin Strong is the son of the King’s Hand, Lyonel Strong.