Originally Posted by Cheesegear
They were stolen by Chaos. It can account for a lot. Let's take maglag's approach. Magic.
Maybe they were supposed to all look the same. We're never told what they looked like before Chaos took them. But, ultimately...Magnus is red. Vulkan is black. Not 'African black'. But, actual, onyx black.
Still, if he could decide what their personalities would be like by altering their DNA alone, you'd think he'd be better spending his time curing every disease ever, and destroying 1/4 of the Chaos Gods in the process.
But no, he's the Emperor, and a megalomaniac, so decides to create super soldiers.
Actually, that does make sense, since he's a mental Space Nazi.
EDIT: Of course, why Chaos wanted Leman Russ to be Scandinavian and Jaghatai Khan to be Asian, I've no idea.