Source Crayola® CSS3 CSS4
#4b5464
 
#4a646c
deep space sparkle
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#6b717f
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#90949a
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey