Biology Question about Green Eyes

<p>Here's another eye question (just because I'm curious & putting off studying for finals):</p>

<p>Everyone on my mother's side of the family has blue eyes; everyone on my father's side of the family has brown eyes. I have eyes that are light brown around the pupil and blue/green/grey on the outside. My eye color also changes depending on the time of the day, my mood, etc.</p>

<p>Why did this happen? Nobody in the last ~3 generations on either side of my family had/has eyes like mine. For that matter, what is the official term for the color of my eyes? I've heard "true hazel," but they are definitely NOT hazel... (You can imagine the problems I've had with deciding what eye color to put down on official documents and forms!)</p>

<p>Thanks :)</p>