What color is Playing Card ?

Source Crayola® CSS3 CSS4
#6c7a78
 
#757575
sonic silver
#808080
grey
#808080
grey
#313f3d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#919f99
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey