Source Crayola® CSS3 CSS4
#9497a8
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#686d8b
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#4c506f
 
#4a646c
deep space sparkle
#483d8b
dark slate blue
#483d8b
darkslateblue
#282840
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey