Silver's uses in magick include divination, clairvoyance, energy, inspiration, defense and repelling spells. Silver represents the Moon; feminine magic; fey magic; mysteries and mystery traditions; the power of silence and stillness; psychic powers that involve being still.
Gray is a color of darkness tempered by light, a color of neutrality, complexity, peace, a balancer of positive /negative. Gray is used in magick to achieve balance, for attuning to the spirit world, to learn peace and patience, veiling, invisibility, vision quests, and dreams.