Purple eyes

Purple eyes are a rare eye colour in Westeros and Essos.

The most well-known shade of purple eyes is violet. Two other shades are lilac and indigo. It is a rare and beautiful eye colour but is relatively common in the Targaryen family, who are descended from the high lords of the ancient Valyrian Freehold. In Westeros, few but the "blood of the dragon" have purple eyes.

The blood of old Valyria is often manifested by eyes in shades of purple, and hair of silver-gold or platinum white. This colouring was typical among Valyrians and is often held up as proof that Valyrians are not entirely of the same blood as other men.

House Targaryen
Striking lilac or indigo or violet eyes are typical Targaryen features and a famous proclamation of their Valyrian heritage. Their practice of incest was kept in part to preserve their rare colouring.

House Velaryon
House Velaryon of Driftmark is an ancient and proud house, with the blood of old Valyria in its veins. Velaryons, like the Targaryens, often have the Valyrian features of silver hair and purple eyes

House Dayne
The trait for violet eyes runs in House Dayne, even though it is an unusual eye colour for non-Valyrians in Westeros. Lady Amiria Dayne and her brothers and sisters all had violet eyes, apart from Ser Eros Dayne who was the runt of the litter.

The Free Cities
Where the blood of the old Valyrian Freehold runs strong, purple eyes and silver hair can still be found. In Lys, even the smallfolk and prostitutes often have the pale skin, silver-gold hair, and the purple, lilac, and pale blue eyes of the dragonlords.