Source Crayola® CSS3 CSS4
#b7b2a0
 
#b0b7c6
cadet blue
#a9a9a9
dark gray
#a9a9a9
darkgrey
#838071
 
#757575
sonic silver
#808080
grey
#808080
grey
#504f45
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey