White is reserved for members of the Chivalry. Although the colors are not restricted, in some kingdoms there may be a misunderstanding. Necklaces of chain links without medallions or other pendants are also worn by special groups. You should avoid them until you ask about local customs. Avoid wearing a sword until you have asked about what is permissible in your kingdom.
Many people wear knives.
There is a special etiquette about bearing a steel blade. To keep the knife or blade from becoming unsheathed accidentally, many people fasten a cord around it to hold it in place. Also, don't handle other people's property without their permission. Ask before you touch. Courteous and honorable behavior is at the cord of the Society.