one time this girl in my art class was telling the table that her eyes change color depending on her mood and i told her that that is scientifically impossible and explained to her the facts on how it is impossible and she started crying
Eye colour can change though. Mine go from being Forrest green to dark brown randomly.
Actually, because your irises expand and contract in accordance with the amount of light entering your pupils, it’s possible for eyes (especially hazel eyes, which include a mix of colors, one of which tends prevalent near the edge of the pupil) to appear to change color depending on the the light.
However, light is not the only stimulus for changes in pupil size. You probably know that taking certain drugs causes your pupils to dilate (meaning your iris is contracted), but research shows that your mood can also affect the size of your pupils. So it’s not unreasonable believe that your eye color changes depending on your mood, though may not be as noticeable as you might think it is.
In other words, don’t be a jerk because you think you know science.
Sources:http://www.allaboutvision.com/conditions/eye-color.htm
http://www.bodylanguageexpert.co.uk/what-do-dilated-pupils-mean.html