What color is Drawing, Project for an Elevation of Garden Architecture (Entrance to a Villa or Garden), 1725–75 ?

Source Crayola® CSS3 CSS4
#7a8186
 
#757575
sonic silver
#808080
grey
#808080
grey
#37413f
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#68665f
 
#6e5160
eggplant
#696969
dim grey
#696969
dimgrey
#948b77
 
#9f8170
beaver
#808080
grey
#808080
grey