On what eye color would the pure hazel colored contact lens look the best?

Pure hazel colored contact lens has a color that is a mixture of yellowish green and light brown.

If you are looking for natural colored contact lens, choose one that has a color same as your eye color. So, the most natural looking eye colors with pure hazel contacts are light brown eyes, and green eyes. Especially, if you have green and brown mixed or grey and green mixed eye color, pure hazel colored contact lens will match very well.