Source Crayola® CSS3 CSS4
#9b9b8c
 
#95918c
gray
#a9a9a9
dark gray
#a9a9a9
darkgrey
#7c796a
 
#757575
sonic silver
#808080
grey
#808080
grey
#57534b
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen