Mine are green, sometimes look blue or grey. I like this given I usually keep my hair either blonde or crazy colours. e.g. right now it's washed out to a sort of pastel pink colour but I'm dyeing it a vibrant red next week.
My favourite on a girl though are either big brown eyes with brunette hair, or really bright blue piercing eyes.
I have black-brown, it’s ok but sometimes I look like an alien in photos.