Look at both the rim of the eye as well as the middle of the iris and try to notice the different colors that you see. Are there flecks of a color showing up? An undertone of green, blue, violet? If you can't tell, hold up those colors by your eyes and see if you notice them or not. Look very closely in the mirror with natural light around you. If your eyes are brown, wear your brown with the white color in the whites of your eyes. It will make your eyes shine and stand out. Wearing your eye color will make you appear credible and trustworthy.