Not really.
There are eyes with no pigment = blue
Only they do not really have no pigment. They would be pink if so, as
in albino eyes. Blue eyes have a *little* pigment near the front of the
eye (most pigment is further back) - just enough to scattter some light
rays causing a blue effect - just like the sky looks blue but has no
true color - light is scattered in a similar way.
All other eyes have variable quantity of pigment, causing all the green
and hazel type colours between blue and brown, on a continuum per the
polygenes of inheritance.
Same with skin colour.
It is also pigment-related and also not "black or white".
There is in-between quantity of pigment, also determined by intensity
genes (polygenes) and it is not a pathology either

Namaste,
IRene
--
Irene de Villiers, B.Sc AASCA MCSSA D.I.Hom/D.Vet.Hom.
P.O. Box 4703 Spokane WA 99220.
www.angelfire.com/fl/furryboots/clickhere.html (Veterinary Homeopath.)
"Man who say it cannot be done should not interrupt one doing it."