Source Crayola® CSS3 CSS4
#728184
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#96a7ab
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#b5cfd9
 
#c5d0e6
periwinkle
#b0c4de
light steel blue
#b0c4de
lightsteelblue
#564b45
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen