What color is Playing Card ?

Source Crayola® CSS3 CSS4
#524a5c
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#8d8091
 
#95918c
gray
#808080
grey
#808080
grey
#786687
 
#757575
sonic silver
#808080
grey
#808080
grey
#69656c
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey