Source Crayola® CSS3 CSS4
#837c75
 
#757575
sonic silver
#808080
grey
#808080
grey
#ada9a1
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#514e4c
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey