My eye color changes due to my shirt color... blue shirt: blue eyes. Green shirt: green eyes. Gray shirt: gray eyes. No shirt: blue-green eyes. Shirt with out blue, green, or gray: blue-green eyes. Can anyone help explain why my eye color changes like that?

That does happen to some people. I forget why. I knew a girl whose eyes constantly changed a lot of colors.

The main reason these sites seem to claim is moods.
https://www.google.com/search?q=why+eye+color+changes+randomly&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=fflb

I never tried seeing how mood affects it, I'll observe my moods and see if that's another reason