Editor’s Note: Examining clothes through the ages, Dress Codes is a new series investigating how the rules of fashion have influenced different cultural arenas — and your closet. CNN  —  Red velvet suit, white fur trim, tall black boots, cozy (if not indulgent) pom-pom hat. Santa Claus’ uniform may have some variations, from Tim Allen’s off-duty outfits in “The Santa Clause” as he slowly transforms into the legendary gift-giver, to The Plastics’ spaghetti-strap-dress versions in “Mean Girls,”