Well, honey, technically any nun who wears a white habit would be considered a "white nun." But if you're talking about a specific order of nuns, the Sisters of Charity of Seton Hill wear white habits. Just remember, it's not the color of the habit that matters, it's the heart underneath it that counts.
Domenican sisters wear an all white habit, as do Cisterians nuns, and I believe Carthusian nuns.
Ursuline nuns wear black dresses and a black and white head dress to show their religion.
Nuns and the Amish
the ursuline nuns came to new France to establish religious settlements.
They changed from mostly black with little white to mostly white with a little black
Different orders wear different colors, Benedictine nuns wear black, Cistercian nuns were white, and there are others. Regardless of the color, the entire "outfit", if you will, is called a habit, you can see more of an explanation at the link below:
The white cloth that covers the head of a nun and which is tied tightly under the chin..
Other nuns
Monks and nuns do the monks' and nuns' jobs now.
nuns
Yes, nuns can vote.
Ursuline nuns wear black dresses and a black and white head dress to show their religion.