The standard says; Eyes Dark, Generally dark brown or hazel. Light eyes undesirable. Moderaely full with a soft look in repose but keen, far away look when dog is rouse. Rims black.

Eyes the colour of peat a well known quote from Miss Noble

a lighter eye gives the wrong expression especially on a dark dog. This eye on a lighter hound would be acceptable.

This is a similar eye on a lighter dog and gives the correct expression.

A lovely pair giving the right expression