Source Crayola® CSS3 CSS4
#2a282d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#505266
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#ca171c
 
#ff2b2b
orange red
#b22222
fire brick
#b22222
firebrick
#868ea2
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#646e8b
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey