Don't spend money on new hardware for your door just yet. Rethink your existing knobs, locks, and hinges and use metal spray paint for a quick update that is friendly on your wallet and your time.
Remove doorknob and lock mechanism from the door. Take photos as you go and label the images—"inside dead bolt" and "outdoor knob"—to aid in reassembly.
Clean the hardware with steel wool, then sand.
Insert a small piece of folded painter's tape into the keyhole so paint doesn't get in the lock mechanism. Insert the door hardware into the foam so you can easily paint all sides.
Spray hardware with metallic primer according to manufacturer's directions. After the primer has thoroughly dried, spray hardware with metallic paint. Let dry. To ensure no fingerprints are left in the paint, allow the hardware to dry for 24 hours. After it is dry, reinstall the hardware on the door.