What color is Card ?

Source Crayola® CSS3 CSS4
#8d9992
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey
#6f7773
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#3b433f
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey