Source Crayola® CSS3 CSS4
#727c91
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#8e97a0
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#3f4d76
 
#4a646c
deep space sparkle
#483d8b
dark slate blue
#483d8b
darkslateblue