Brown represents effectiveness, strength, reliability warmth, comfort, security, politeness, richness, and helpfulness. Brown usually represents earth and natural things. Brown can also create feelings of sadness and isolation brown can also be conventional and sophisticated.
Gray is the color of independence and self-reliance, gray represents separation, lack of involvement and ultimately loneliness. Grey is associated with old age, death, taxes, depression or a lost sense of direction.
Silver represents prestige and cleanness. Silver can also come off as cold and scientific. Silver is balancing, harmonizing and sensitive.