Source Crayola® CSS3 CSS4
#c1cdcf
 
#cdc5c2
silver
#d3d3d3
light gray
#d3d3d3
lightgrey
#657494
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#8194b2
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#44526d
 
#4a646c
deep space sparkle
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey