What color is Book Illustration, Perspectivae pictorum atque architectorum, Perspective drawing of dome interior, plate 91 ?

Source Crayola® CSS3 CSS4
#655f52
 
#6e5160
eggplant
#696969
dim grey
#696969
dimgrey
#898473
 
#9f8170
beaver
#808080
grey
#808080
grey
#2e2b26
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#aba895
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey