What color is Shagreen Case for Traveling Cutlery Set Case, ca. 1798–1809 ?

Source Crayola® CSS3 CSS4
#5a7a5e
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#a8a399
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#50604d
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen