What color is Playing Card ?

Source Crayola® CSS3 CSS4
#707c7b
 
#757575
sonic silver
#808080
grey
#808080
grey
#314744
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#756a6e
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#474244
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey