Source Crayola® CSS3 CSS4
#aba1a1
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#897e7e
 
#757575
sonic silver
#808080
grey
#808080
grey
#afb8c7
 
#b0b7c6
cadet blue
#c0c0c0
silver
#c0c0c0
silver