What color is Drawing, Part of a sheet of a drawing book: figures and architectural plans, late 18th century ?

Source Crayola® CSS3 CSS4
#ac8881
 
#9f8170
beaver
#bc8f8f
rosy brown
#bc8f8f
rosybrown
#664847
 
#6e5160
eggplant
#556b2f
dark olive green
#556b2f
darkolivegreen
#886263
 
#8a795d
shadow
#696969
dim grey
#696969
dimgrey
#402a2e
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#a099a4
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey