What color is Print, Walls of the Grand Cañon, Colorado River, ca. 1875 ?

Source Crayola® CSS3 CSS4
#2c2b27
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#5c564c
 
#6e5160
eggplant
#556b2f
dark olive green
#556b2f
darkolivegreen
#807666
 
#8a795d
shadow
#696969
dim grey
#696969
dimgrey
#a59883
 
#95918c
gray
#bc8f8f
rosy brown
#bc8f8f
rosybrown