Source Crayola® CSS3 CSS4
#313b4d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#5f6f84
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#879ab0
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#b6bdc5
 
#b0b7c6
cadet blue
#c0c0c0
silver
#c0c0c0
silver