Percy's, Annabeth's, Leo's, Thalia's, and Nico's eyes. I don't agree with percys though.... I imagined them a different green and more intense. Just me? <- it not possible for someone to have a really intense green. And Nico doesn't have grey/black eyes. He has dark brown. The fandom needs to noticed that Nico doesn't have Black/grey eyes. He just has normal dark brown eyes.