What color is Playing Card ?

Source Crayola® CSS3 CSS4
#232723
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#6c7168
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#424840
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey