A classic rule of thumb is to highlight your eye colour by choosing neutral or complementary shades. For example: a neutral brown shadow makes blue eyes stand out. Using blue shadow that matches your eyes makes them fade away. Green, plum and blue shades are stunning with brown eyes while warm bronze tones look good with every eye colour. If you have hazel eyes with green flecks, try a darker khaki (a greenish brown) shade to highlight the flecks.