So I'm going to start with Percy's hair and then go from there k. I have always pictured him with obsidian black hair and you can never tame so there are always points of his hair sticking out making him look like a skateboarder ( sorry to anybody that skateboards )
His eyes are this beautiful colour of sea green but they have flex of black and red in his eyes ( mainly because I've read to many fanfic in which he has Hades and Hestia's blessings and that always stuck with me )
Like this one ☝️ except for the flecks of black and red.
I picture him with a lean body figure and his muscular but not over muscular, he has a six pack ( just cuz )
When he gets really mad his eyes turn a poisonous green and it looks like a fire is blazing in his eyes
This is what I picture him in a lot
Comment if I left something out when I described him.