why do my eyes change green/blue/grey and why do they have orange rimming the pupil?

[Ellen]

sometimes my eyes are blue and sometimes they're green and sometimes they're grey and it is in the same lighting same room same color shirt (BLACK) and do not say its not possible cuz one day i was looking in the mirror before this play i was doing and me and my friend were talking about how my eyes change color and while i wuz lookin in the mirror my eyes changed from bright blue to bright green really fast...it is not because of the seasons or my mood either