i would also sugest either blues or greens, the one great thing about hazel eyes is if you put a color on your lids your eyes will pick up the color and reflect it back, really any color that works with your skin tone will be fine though i sugest avoiding black because it will over power your eye color.
also for the lashes looking thicker w/o any false lashes i find drawing your eyeliner on slightly thicker on the outer third of your eye in comparison with the front half of the eye lid. and match this color with your mascara. When you put the mascara on the extra dark area on the outer edge will trick the eye of the onlocker and they will assume that you just have awsome lashes