Day walkers can get tans and usually have brown eyes and unlike gingers, they have souls.
The word originated from a south park episode called "Ginger kids"
"Day walkers are superior to gingers"
B: Be careful, that one is a daywalker.. she works for the gingers... i mean yeah... she looks harmless enough, but she could kill you in your sleep...
John: Both gingers and day walkers.
Paul: Well, I don't mind day walkers.
John: Me either.