What color is Drawing, Study for "For the Zoo" ?

Source Crayola® CSS3 CSS4
#b5c8c1
 
#b0b7c6
cadet blue
#c0c0c0
silver
#c0c0c0
silver
#2b2b26
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#625947
 
#6e5160
eggplant
#556b2f
dark olive green
#556b2f
darkolivegreen
#7a786a
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey