Difference between Chestnut brown and Hazel eyes?

what's the difference between Chestnut brown and hazel eyes, they both look exactly the same to me?


Also, whats the difference between hazel and brown?

Difference between Chestnut brown and Hazel eyes?
Chestnut brown is light to dark brown eyes. Hazel eyes are green and brown.
Reply:hazel has green and brown.