I think the idea is that average people have no clue what color they are. So they'd be forced to take it out to check and thus have to restart their PC. It's a trick!

Altho, maybe I'm misunderstanding something because all the pins of all the electrical cords I've ever seen have been silver?

I'd make up some BS about an old version of the product using brass or copper, and newer versions using aluminum or iron, so knowing the color will help me know how to fix it

Stainless is probably more likely than copper, but the point is to trick them into unplugging the thing