I just realized this but I've never imagine Percy as white. When I read the books I always imagined his Mother being like a first generation American whose parents had been from like Puerto Rico or a Polynesian island.
see i have cause I’ve pictured him the same way since I was little, and part of the reason I see him as white is cause I saw the movie first–the movie is what helped me find the series–but I also pictured him looking kinda like me, someone with mediterranean features, especially since i relate to him and he bears a strong resemblance to Poseidon, a Greek god: olive toned skin, thick dark hair, all that jazz. but I seriously love all the ideas and fan arts of Percy being something other than caucasian! I’m all for it man!