My dumb childhood self who barely even watched ygo had a wild imagination and thought that atem’s crazy colors came from the 3 egyptian gods screwing up his genes like:
Obelisk: So this is our hooman from the prophecy? Ra: Yep, he will be. He’s not born yet. Let’s leave a mark on him for foreshadowing that he’s our destined wielder or something. Osiris: Dibs on the ends of his hair. I should always be the one on top. Ra: My part should stand out. The hair’s fringe should be yellow and some of the locks should stick out like my sun rays. Obelisk: Uh… I’m mixing my blue with the red of his eyes then. If he’ll become pharaoh one day, then he should have the eyes of a commander. Ra: Huh… Aren’t we overdoing it? His reincarnations or (possibly) hosts might get… affected. Obelisk and Osiris: …..Nahhhhh. 3000 years later… Yugi’s mom, holding her baby: what the fuk