What color is Poster, London Museum of Practical Geology ?

Source Crayola® CSS3 CSS4
#4a5461
 
#4a646c
deep space sparkle
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#d6bdad
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#2f3133
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey