Source Crayola® CSS3 CSS4
#c5bbc6
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#9ca5a5
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#404344
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey