The person most likely to die first in any TV show, or film, regardless of what colour sweater they're wearing.
Taken from Star Trek the Original Series, where the security guards wore red, one always 'beamed down' from the spaceship to planets on exploratory missions and always died first. Always.
Don't ever wear a red shirt on a space mission!
"Ahhh look at the Redshirt, he's gonna get it first"
"Nahh, the blonde'll die first, they always do in horror movies".