That is a good tip. I would have thought golden eye shadow would make blue eyes pop the most, so yeah.
I also wanna add that for me to make my green eyes pop, eye shadows in either red, pink or purple does the trick. Warm browns (like chestnut) work too but not as intensely.
For brown eyes I'm not sure, but I'd guess that blue or green eye shadows would probably do it. What generally works is to use the complementary (opposite) colour which makes the strongest contrast.
