Believe it or not, gray is a pretty stable color. Although in the dark side it displays traits of safety, reliability, intelligence, modesty, dignity, maturity, soundness, functionality and old age.
The down side of gray is a tendency to melancholy and grief.
Brown is the color of Earth, hearth, home, outdoors, reliability, comfort, endurance, stability, simplicity, comfort, trees, nature and autumn.
Negative traits associated with brown are shyness, solitude and coldness.