What is the need / application? Is it the whole nail, or just the head?
This looks galvanized–which means you can’t “patina” it–painting it with metal spray paint (priming first is ideal). It’s a common trick for screws–place them into cardboard they are held & spaced far enough apart to spray easily (and keeps your hands cleaner, too).
And keep in mind, if you get it looking nice, but then try to hammer it in place, that action may mess up the finish, so you may need to put a buffer (tape or bit of cardboard) between the hammer head and nail head)… I’ve bought “white” panel nails, and most the paint flakes off from nailing–the metal nail flexes, but the paint coating doesn’t. So be prepared to do touch-ups after putting them in place, too.