Well, in New moon, I think it's Heidi who has purple eye colour because she puts blue contacts over her red eyes but in the twilight saga I don't think it mentions purple eyed vamps.
Hope this helps :)
In fictional stories, vampires can have any eye color, including purple. This trait is often used to signify supernatural or mystical characteristics in the vampire character.
They can have any hair color.
red
purple
Purple !
Purple.
purple?
red
Purple is the most uncommon eye color
Alicia Keys' favorite color is purple.
Purple. Only a couple people in the world have it as an eye color. One of them Liz Taylor
In sonic x her eyes are green but in comics her eye color was purple,blue,and green
No, that's just their normal eye color.
A violet purple.