I too have brown eyes and my signature look is to use a shimmery cream or eggshell for the entire eyelid first, then blend a dark brown or plum in the crease.
Blue is restive and can be a deep dark midnight blue or a soft robin's eggshell blue with all the hues in between.
Another important point, in which the moas agree with the other Ratitae and differ from the kiwis, are the branched, instead of simple, porous canals in the eggshell.
I want a VOC free alternative to a traditional oil based eggshell.
There is a suggestion that eating the eggshell can help the female to replace some calcium.