What color is Sketchbook Folio, Beach with Rocks, Trees, and Distant Boats, 1870–85 ?

Source Crayola® CSS3 CSS4
#b4a797
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#55504d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#776e66
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey