Source Crayola® CSS3 CSS4
#989689
 
#95918c
gray
#808080
grey
#808080
grey
#787a70
 
#757575
sonic silver
#808080
grey
#808080
grey
#525751
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey