What color is Poster, Chicago, Naissance d’une métropole [Birth of a metropolis] 1872–1922 ?

Source Crayola® CSS3 CSS4
#81786d
 
#757575
sonic silver
#808080
grey
#808080
grey
#403b38
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#c6bfb4
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#a2998d
 
#95918c
gray
#bc8f8f
rosy brown
#bc8f8f
rosybrown
#605850
 
#6e5160
eggplant
#696969
dim grey
#696969
dimgrey