What color is Card ?

Source Crayola® CSS3 CSS4
#282d2b
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#474d4a
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#646b66
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey