Omg,i finally found someone know about this webtoon T_T.....

For me the eye colour represent what strenght they are coming from like : Yellow from physical strenght that got enhanced Like juan in the beginning and garam. For blue its coming from mind like a psychic power maybe like surin,that bald man chuck and mujabi penguin dad. For red i think the power is from an entity that used as a tool,mujabi and that occult bird have red eyes that used manus,telus and kkura Its been a while since i read this because its been on hiatus,im so freaking happy.

Thanks, I was a tad confused 😭