Costume designer Lindy Hemming described the Joker's look as reflecting his personality, in that "he doesn't care about himself at all"; she avoided designing him as a vagrant, but still made him appear to be "scruffier, grungier," so that "when you see him move, he's slightly twitchier or edgy."[20][31][31] Nolan noted, "We gave a Francis Bacon spin to [his face]. This corruption, this decay in the texture of the look itself. It's grubby. You can almost imagine what he smells like."[99] In creating the "anarchical" look of the Joker, Hemming drew inspiration from such countercultural pop culture artists as Pete Doherty, Iggy Pop, and Johnny Rotten.[100] Ledger described his "clown" mask, made up of three pieces of stamped silicone, as a "new technology," taking less than an hour for the make-up artists to apply, much faster than more-conventional prosthetics usually requires. Ledger also said that he felt he was barely wearing any make-up.[20][101]
Hemming and Ledger's Joker design has had an impact in popular and political culture in the form of the Barack Obama "Joker" poster, and has since become a meme in its own right.[102]
Designers improved on the design of the Batsuit from Batman Begins, adding wide elastic banding to help bind the costume to Bale, and suggest more sophisticated technology. It was constructed from 200 individual pieces of rubber, fiberglass, metallic mesh, and nylon. The new cowl was modeled after a motorcycle helmet and separated from the neck piece, allowing Bale to turn his head left and right and nod up and down.[103] The cowl is equipped to show white lenses over the eyes when the character turns on his sonardetection, which gives Batman the white eyed look from the comics and animation.[104] The gauntlets have retractable razors which can be fired.[103] Though the new costume is eight pounds heavier, Bale found it more comfortable and less hot to wear.[17] The depiction of Gotham City is less gritty than in Batman Begins.