I have no idea. It really depends on what I wear, the lighting, etc. My mom used to say they were Hazel, but there's no brown. Just blue or green. Both is not really an option when you have to check a box, so I usually say blue since my siblings both have blue eyes.
Not too long ago, we were on a vacation and saw one of those places where they take an up close picture of your eyeball and you can get a digital copy or prints to use as artwork. I was kind of fascinated by it, but we walked by. I keep wishing I'd gotten one so I could finally solve the mystery!