You have probably noticed tropes in media, literature or even makeup about certain things being associated with spiritual people and here I will explain as much as I know about this. These are not exclusive but there is a logic and a spiritual function or significance behind the things I mention.
The first one that less people might know is purple lipstick or purple lips being associated with magicians. The reason for this is because purple is associated with the spirit world and regardless of your spiritual path you see this color when you open your third eye. The color of purple has many associations with wealth and spirituality and the shades of purple lipstick have titles that follow this trend such as Philosopher, Coven, Potion etc. It is also the holy color of Lavenderism. The functions of the color purple are uplifting, calming your mind, connecting to the spirit world, and encouraging creative energies.
The other thing you notice is white or silver hair. This is because it is associated with wisdom, ghosts, or inner peace. Many spiritual people will dye their hair white while some will even have their hair turn prematurely gray or white due to magic. It may not be their entire head or body but they can notice premature white hairs on their face or other parts of their body. This is a trade off because despite seeing premature gray and white magicians do not actually see other signs of aging for longer than others.
Wearing bones, teeth, or antlers are another trend for those who resonate with energies of death. It connects you with death itself but also the energies of whatever animal the bones came from, allowing you to connect with that energy. A lot of them can also provide protection if they are used in certain rituals or have spirits attached to them.