lets see...You're the one trying to push the notion that the skin color of the ENTIRE BODY was changed... and YOURE the one using this illogical falsehood stupidity:
1. God did it so people wouldn't accidentally kill him? Even though the whole point was that Cain would be afraid for those deliberately seeking to murder him. You Dummy.
2. You thinking that changing his skin color is somehow helping people "not" recognize him? Well you gotta make a whole bunch of assumptions. But before we do so, you're as coy as No Surprise. What color was Cain's ENTIRE BODY CHANGED TO (since you're insisting he wasn't merely marked). After all, dummy, now he's got this newfangled thing going on that attracts MORE attention!
Adam was 1 color Eve came from him....
at that time we had Adam and Eve = 1 color.
now we have dark skin and light skin.
how did that happen genius?